Management
Prof. Dr. rer. nat. Michael Scheffler
Chair of Ceramics
- Vita
- 1985-1990 Studium der Chemie, Technische Hochschule Leuna-Merseburg
- 1990 - 1993 Dissertation "Synthese und Charakterisierung nickelhaltiger Pillared Clays", Institut für Anorganische Chemie der Technischen Hochschule Merseburg, später Martin-Luther-Universität Halle-Wittenberg
- 1993 - 1994 wissenschaftlicher Mitarbeiter am Institut für Anorganische Chemie der Martin-Luther-Universität Halle-Wittenberg
- 1994 - 1998 wissenschaftlicher Mitarbeiter/PostDoc am Institut für Physikalische Hochtechnologie (IPHT) e.V. in Jena, Bereich Moderne Optik, Abt. Optische Fasern
- 1999-2000 wiss. Mitarbeiter am Lehrstuhl f. Glas und Keramik, Universität Erlangen-Nürnberg
- 2000-2003 Leiter der Arbeitsgruppe Polymerkeramik am Lehrstuhl für Glas und Keramik, Universität Erlangen
- seit 1999 div. DAAD-Aufenthalte an Partnerinstituten im Ausland
- 2003-2005 Forschungsstipendiat/Visiting Scholar am MS&E, Univ. of Washington, Seattle, WA, USA
- 2005-2006 Bayerisches Zentrum für Angewandte Energieforschung e.V. (ZAE Bayern), Leiter der Abteilung Thermosensorik und Photovoltaik, Erlangen, und Mitglied im erweiterten Vorstand des ZAE Bayern
- 2006-2009 Lehrstuhlinhaber des LS Leichtbaukeramik, Brandenburgische Technische Universität (BTU) Cottbus
- seit 10/2009 Lehrstuhlinhaber des LS Werkstofftechnik und Geschäftsführender Institutsleiter des Instituts für Werkstoff- und Fügetechnik, Otto-von-Guericke-Universität Magdeburg
- Mitgliedschaften: Gesellschaft Deutscher Chemiker (GDCh), American Ceramic Society (ACerS), Gesellschaft für Chemische Technik und Biotechnologie e.V. (DECHEMA)
- seit 2010 Leiter des DGM-Fachausschusses ZELLULARE WERKSTOFFE
- thermische Zersetzung präkeramischer Polymere, Reaktionen mit Füllstoffen, Anwendung und Formgebung
- zellulare Keramiken: Herstellung, Charakterisierung, Oberflächenmodifizierung, Reaktionen in offenzelligen Keramikporen
- Nanoaggregate und Intercalate von Nanoaggregaten in mesoporösen Keramiken
- neuartige Feuerfestwerkstoffe
- anorganische Funktions- und Multifunktionsmaterialien/Materialien für erneuerbare Energietechniken (Solarzellen, Brennstoffzellen, Wärmespeichermaterialien)
Current projects
Development of a technology for the production of a new moisture-insensitive heating element using novel filling and potting compounds based on MgO and polymer-derived ceramics
Duration: 01.07.2024 bis 30.06.2026
The current situation shows that new solutions and technologies need to be used in the development and production of electrical heating elements as the requirements for precise temperature control, service life and functionality increase. The use of new materials and the reliable production of heating elements made from these materials are of particular importance. Progressive miniaturization in the field of (plastic) injection moulding is constantly increasing the demands on the heating elements used in terms of compactness and resistance to temperature, erosion and moisture. As a result, heating elements with small diameters (less than 1.5 mm) are becoming increasingly important. For the reasons mentioned above, the aim of the research project is to
Development of a technology for the production of a new moisture-insensitive heating element using novel potting compounds made of polymer-derived ceramics (PDC) using investment materials based on MgO.
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Development of a technology for the production of a new moisture-insensitive heating element using novel filling and potting compounds based on MgO and polymer-derived ceramics
Duration: 01.07.2024 bis 30.06.2026
Product quality requirements are becoming increasingly stringent. For products whose manufacture includes heat treatment steps, this means, among other things, mastering precise temperature control, but also adapting the heating elements used to the process in such a way that they have a long service life, high functionality and a low functional loss rate. In addition, there are issues of progressive miniaturization, e.g. in the field of (plastic) injection moulding, which expands the catalog of requirements for such heating elements in terms of their compactness, but also with regard to temperature, erosion and moisture resistance. In this context, heating elements with diameters of around 1.5 mm and in the working temperature range below 500 °C play a special role.
The aim of the project is therefore to develop a completely new, moisture-impermeable material based on pre-ceramic formulations and an investment material that is less sensitive to moisture, and to integrate the application into the existing heating element production process.
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Completed projects
Deutschsprachige Studiengänge Elektrotechnik, Verfahrens- und Systemtechnik und Maschinenbau der OVGU mit der NTUU Kiew–KPI und der NTU Kharkiv-KhPI (in Kooperation mit der DonNTU)
Duration: 01.01.2023 bis 31.12.2024
Dieses gemeinsame Projekt der Fakultäten des Ingenieurcampus (FEIT, FMB und FVST) der OVGU mit der NTUU Kiew–KPI und der NTU Kharkiv-KhPI (in Kooperation mit der DonNTU) baut auf einer langjährigen Zusammenarbeit der OVGU mit den ukrainischen Universitäten in Kiew, Kharkiv und Donezk auf. In den Jahren 2023 und 2024 wurde die Kooperation der deutschen und ukrainischen Partner unter erschwerten Bedingungen fortgeführt und inhaltlich weiterentwickelt. Dies betraf die weitere Kompatibilisierung der deutschsprachigen Studiengänge der ukrainischen Partner, aber auch die sprachliche Weiterqualifizierung von DozentInnen und DeutschlehrerInnen; bei den Erstgenannten lag der Fokus auf allgemeinsprachlicher, bei den Letztgenannten auf fachsprachlicher Weiterentwicklung. Dazu wurden fachsprachlich besonders aufbereitete Deutschvorlesungen für die DeutschlehrerInnen angeboten, Praktika (kriegsbedingt) in online-Formate umgewandelt, Kurse zum Vertiefen der deutschen Sprache angeboten und Fachvorlesungen für Studierende online durchgeführt sowie Studierenden in Magdeburg die Teilnahme an Fachvorlesungen ermöglicht. Ein Teil der in Magdeburg weilenden Studierenden in den entsprechenden Master-Studiengängen fertigte Masterarbeiten an, die erfolgreich verteidigt wurden. Dadurch war in Teilen auch ein Aufrechterhalten etablierter Forschungskooperationen nach Kiew und Kharkiv möglich.
German-language degree programs in Electrical Engineering, Process and Systems Engineering and Mechanical Engineering at OVGU with NTUU Kiev-KPI and NTU Kharkiv-KhPI (in cooperation with DonNTU)
Duration: 01.01.2023 bis 31.12.2024
This joint project between the faculties of the OVGU engineering campus (FEIT, FMB and FVST) with NTUU Kiev-KPI and NTU Kharkiv-KhPI (in cooperation with DonNTU) builds on many years of cooperation between OVGU and the Ukrainian universities in Kiev, Kharkiv and Donetsk. In 2023 and 2024, the cooperation between the German and Ukrainian partners was continued under difficult conditions and further developed in terms of content. This involved making the Ukrainian partners' German-language courses of study more compatible, but also the further linguistic qualification of lecturers and German teachers; for the former, the focus was on general language development, for the latter on specialist language development. To this end, specially prepared German lectures were offered for German teachers, internships (due to the war) were converted into online formats, courses were offered to improve German language skills, specialist lectures were held online for students and students in Magdeburg were able to take part in specialist lectures. Some of the students on the relevant Master's degree courses in Magdeburg completed Master's theses, which were successfully defended. This also made it possible to maintain some of the established research collaborations with Kiev and Kharkiv.
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Kriechverhalten von gerichtet solidified Mo-Werkstoffen mit und ohne Beschichtung; High temperature mechanical behavior of advanced directionally solidified multi-phase Mo-alloys
Duration: 01.04.2020 bis 31.12.2024
As part of the DFG joint project launched in 2020, complex, multifunctional oxidation protection coating systems were developed for the material protection of molybdenum (Mo)-containing refractory metal alloys. Such alloys exhibit higher thermal stability than the nickel-based superalloys previously used as turbine materials. With sufficient long-term stability, they could therefore be operated in turbine applications at temperatures 150 K higher, which would result in an increase in turbine efficiency. However, the oxidation of Mo and the evaporation as Mo oxide are proving to be a problem, which inevitably leads to the mechanical disintegration of a corresponding component and requires protective coatings of a few tens to a few hundred micrometers thick, preferably with a self-healing function to prevent cracking in the coating.
Such a coating system, consisting of a so-called preceramic polymer - an oligomeric chemical compound that can be converted into a ceramic by heat treatment -, particulate fillers such as silicon, boron and hexagonal boron nitride, was tested in long-term oxidation experiments and shows promising properties on selected Mo-containing alloys.
As the layer thicknesses cannot be extended indefinitely, a supplementary application was submitted to the above-mentioned application in order to combine the coating process based on filled preceramic polymers with the so-called pack cementation process - a coating process in which protective components such as boron and silicon are applied from the powder bed using transport agents via diffusion processes in the gas phase - and thus a) to further increase the layer thicknesses and b) the effectiveness of the protective layers obtained. Initial results are promising and show that it is possible to combine both processes to produce oxidation protection coatings with thicknesses of more than one hundred micrometers. The work on combining both processes is being systematically investigated as part of a Walter Benjamin Research Fellowship funded by the DFG.
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International Scientific Events and Annual Conferences of Scientific and Academic Associations – Financial support for the 8th Internationale Conference on Cellular Materials–CELLMAT 2024 –
Duration: 27.11.2024 bis 29.11.2024
The 8th International Conference on Cellular Materials – CellMAT 2024 – organized under the conference chair Michael Scheffler, together with six co-chairs from Germany and 21 program committee members from all over the world and hosted by the Deutsche Gesellschaft für Materialkunde e. V. (DGM), was held from 27-NOV-2024 to 29-NOV-2024 in Magdeburg, Germany, in the Fortress Mark. Almost 70 participants from academia, institutes and industry from 13 countries took part in this international event and reported on current research results on cellular materials of all classes. The total of 54 contributions included 4 keynote lectures, 4 invited lectures and seven posters. The opening lecture was given by the renowned metallurgist and materials scientist Christos Aneziris from the Technical University Bergakademie Freiberg, Saxony. The next CellMAT is expected to be held in spring 2027.
Creep behavior of directionally solidified Mo materials with and without coating
Duration: 01.04.2020 bis 31.03.2023
The work focuses on the development and characterization of novel multiphase high-temperature materials based on a Mo solid solution phase (Moss) reinforced with intermetallic Mo2ZrB2 and Mo2HfB2 phases with high melting points. Mo-Hf-B and Mo-Zr-B are a class of high-temperature materials that can find various applications, e.g. in the aircraft industry due to their high creep resistance at the targeted application temperatures, which is superior to modern nickel-based superalloys. However, the material behaviour in the medium temperature range is critical; here the molybdenum oxidizes, which makes material protection necessary.
As part of a sub-project, self-healing coating systems are being developed, characterized and tested in an application-oriented manner. These coating systems consist of an oxygen-free preceramic polymer and oxygen-binding filler particles such as Si and B. The conversion into a closed ceramic protective layer takes place in an inert atmosphere in the temperature range between 800 °C and 1200 °C.
Cyclic oxidation tests prove a protective effect (still to be improved) of the coating in the temperature range between 800 °C and 1000 °C; the effect at higher temperatures is currently being investigated.
Initial results of radiographic investigations show that a zirconium molybdate phase is formed by adding ZrO2 as an additional filler, i.e. the alloy components Mo react to form stable phases and remain in the sample; the evaporation of Mo oxides is largely prevented. The role of the protective layer in this process has not yet been fully clarified and is the subject of further investigations.
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Sintering behavior of reticulated porous ceramics (RPCs)
Duration: 01.01.2020 bis 31.12.2022
Cellular ceramics are of great importance in the metalworking industry as a filter medium for molten metals in foundry processes. The Schwartzwalder or replica process is the state of the art for the production of these ceramic foams. The basis is the application of a ceramic dispersion to a polymer foam template, followed by burning out the template and sintering the green body. The resulting ceramic foams are characterized by cavities in the web material resulting from the burnout of the template structure and longitudinal cracks in the webs resulting from the incomplete coating of the template. These cavities and cracks offer the potential for functionalization of the cellular ceramic, for example by loading with active species, but also limit the mechanical stability of the structure.
There are isolated, qualitative descriptions of the formation of cracks in the bar material in the literature, which take into account factors such as the wetting of the polymer template as well as thermal expansion and gas development during the template burnout. However, a systematic investigation of the effects, which also includes the shrinkage of the web material, is lacking.
The aim of the project is to investigate the hollow web structure - on the one hand in simplified model systems and on the other hand in cellular structures - as a function of the sintering temperature. Polymer rods with different cross-sectional profiles are used as model systems, which can be coated with ceramic dispersion in a very defined way by dip coating. Model materials are common engineering ceramics such as alumina or zirconia. The samples - model bridges as well as cellular ceramics - are primarily examined using micro-computed tomography. This method allows the precise analysis of material thickness and cavities in the examined structures. The final aim of the project is to develop a model that can be used to predict the hollow web volume on the one hand, and the frequency and dimension of longitudinal cracks in the web material on the other, as a function of the sintering temperature for a ceramic material of known shrinkage. This allows the process optimization for the production of replica foams - both with regard to an improvement in strength (avoidance of cracks) and with regard to a hollow web functionalization (control of the hollow web accessibility).
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Cellular ceramics from adamantine compounds
Duration: 01.01.2020 bis 31.12.2022
Adamantane-like compounds contain materials whose crystal structure can be derived from the adamantane matrix or the structure of diamond. Examples are ceramics such as SiC, AlN but also ZnO, which all crystallize in the wurzite structure, the diamond lattice for binary compounds. The basic structure contains a tetrahedral environment for both cations and anions. Due to the simple structure, the adamantane-like compounds have good phonon conductivity and, as a result, good thermal conductivity. Due to the large covalent bond fractions, high temperatures and/or sintering additives are usually required for sintering these compounds. With the exception of SiC, hardly any cellular ceramics have been produced from these materials to date.
The aim of the project is the production and characterization of cellular ceramics - primarily from the adamantane-like compounds AlN and ZnO. This includes the development of suitable dispersions for the application of the Schwartzwalder process as well as the selection of suitable sintering additives and sintering conditions. The foams obtained will then be characterized with regard to their microstructure and properties (thermal conductivity, mechanical properties).
Due to the complex composition of the ceramic raw material (base material + sintering aids), the formation of various secondary phases, for example Y-Al-O compounds in the system AlN-Y2O3, often occurs. These secondary phases significantly influence the properties of the base material. The phase evolution in the system AlN-Y2O3 is well studied, while for the system ZnO-Sb2O3-Bi2O3 phases of unknown structure often occur. Therefore, the investigation of the phase composition in the ceramic web material of the foams produced using the powder diffraction method is a focal point. This also includes the structural characterization of unknown phases - if purely representable - on the basis of data obtained from powder X-ray diffraction.
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Active oxidation protection coatings for Mo-Si-B high-temperature materials
Duration: 01.04.2020 bis 30.04.2022
High-temperature resistant Mo-Si-B materials are being intensively investigated as suitable substitutes for nickel-based materials. A known problem with these materials is their oxidation behavior. The Mo solid solution phase in particular oxidizes catastrophically depending on the temperature, forming a volatile Mo oxide. Previously known protective coating systems have not been able to solve this problem satisfactorily. The aim of the project is to develop a new protective system based on preceramic polymers containing fillers with high oxidation resistance.
As part of the sub-project, oxidation protection coating systems based on preceramic polymers of the polysilazane type with oxygen-absorbing filler particles (Si, B, silicides) are being developed and tested in application-oriented oxidation tests with regard to their protective effect. In addition to a perhydropolysilazane, promising compositions contain 25 % silicon and 15 % boron by volume; both fillers form a low-viscosity glass under oxygen absorption, which is able to close microcracks in the coating system and on the material surface to be protected. Modifications of the protective coatings are currently being carried out with the filler boron nitride. Oxidation tests of the coated refractory metal alloys pyrolyzed at 1000 °C in nitrogen show very good oxidation protection at 800 °C, which showed no further changes in mass over the test period of 100 hours after an initial increase in mass, thus indicating a high protective effect.
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MEMoRIAL-Module II: Materials Science
Duration: 01.09.2016 bis 30.04.2022
The availability of novel MATERIALS is a key issue for technical innovations, e. g. in energy conversion, mobility or medical engineering. While the effort of R & D in developing new materials was immens over the last years, there is a lack in a detailed understanding of the materials´ behaviour like in complex mechanical stress situations or when exposed to high temperature or radiation. This holds for compact as well for cellular materials.
In order to bridge this gap an integrated approach will focus on the combination of materials processing, materials design, complex stress situations in materials and mathematical modelling. While several of these categories are already combined to each other, R & D of holistic approaches is still in the beginning, and the challenge is to develop connected models which describe the process-microstructure-properties-relationships of materials of different provinience and porosity. Only such a combined approach will allow feedback between materials design and materials behavior.
PhD students in materials science and technology will have the opportunity within a four-year track to work with modern processing technologies and high-tech characterization methods such as state-of-the-art scanning electron microscopy, biaxial testing equipment and several in situ and combined methods. A four-year track is intended.
MEMoRIAL-M2.6 | Preparation and characterisation of cellular metals
Duration: 01.01.2018 bis 31.03.2022
Due to their outstanding properties metallic cellular structures have increasingly come into focus of research and development. A great number of potential applications has yet been addressed, not least including the utilisation for the purpose of structural support as well as applications in the fields of light-weight construction or biomedicine.
However, the specific surface area of those structures is commonly too small. Moreover, cellular structures may cause mechanical instabilities of materials if critical heigths or diameters are exceeded. To bridge this gap, novel manufacturing strategies have to be developed and transferred to common materials.
The objective of this sub-project is to develop a novel processing route in order to produce mechanically stable, high-surface area cellular metals. The development of "process-microstructure-properties" relations is essential for the understanding of the material's behaviour.
Solid state microstructure and mechanical characterisation, non-destructive and application-related testing, as well as collaborations with our partners of the materials simulation group make up integral parts of this sub-project.
Development of a new combustion chamber for low-emission high-temperature pellet combustion plants made of a new ceramic SiC-based composite material and a new technology for manufacturing this composite material
Duration: 01.01.2018 bis 30.04.2021
The use of renewable raw materials to generate energy and heat is also becoming increasingly important due to the urgent need to reduce CO2 emissions. In particular, the area of energy generation from biomass, including pellet combustion, is recording high growth rates. The current widespread use of biomass to generate energy through low-temperature combustion has significant disadvantages such as the production of CO, dioxins and toxic components. The lack of options for controlled combustion at high temperatures has so far prevented energy-efficient plants.
The aim of the project is to develop a new combustion chamber for low-emission high-temperature pellet combustion systems made from a new ceramic SiC-based composite material and a new technology for manufacturing this composite material. With dynamically controlled high-temperature combustion above 1,350 °C in newly developed combustion chambers, low-emission combustion with high efficiency is now possible. The material price for SiC-based products is to be reduced by 50 % and the thermal conductivity of the combustion chambers increased by at least 300 %.
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MEMoRIAL-M2.5 | Preparation and characterisation of ceramic foams
Duration: 01.02.2017 bis 30.04.2021
Background
Ceramic foams produced by the replica technique have many advantages due to their structure and material properties, but have a comparatively small surface area (compared to, e.g., fixed-bed reactor fillings). Furthermore, the potential of the production-related hollow strut was found to be expandable.
Objective
>> Increase of the actively usable surface of replica ceramic foams while maintaining the mechanical strength
Methods
Replica technique, sacrificial materials, Sol-gel-alumina powder, demixing, freeze casting
Results
Through a combination of replica process and freeze processing, ceramic foams with at least doubled proportion of open strut porosity and a compressive strength around 1 MPa were produced.
The prepared specimens (total porosity ~ 90%), were extensively characterized in terms of strut porosity, width of pore and material lamellae, pore volume, object-surface to object-volume ratio and compressive strength. The most important process parameters for achieving stable and highly porous foams were identified as freezing temperature, solid content and amount of thickening agent.
In addition, it was shown that the foam supports, which contained additional pores, can be coated with a high load of zeolite MFI.
Conclusions
The newly developed process has expanded the application range of replica ceramic foams, as the disadvantage of a comparatively small surface area was eliminated while maintaining sufficient mechanical strength.
Orignality
To the best of our knowledge, this approach has not been performed or studied in detail by anyone else in the way presented here.
The contribution of the work is seen as very profitable in terms of the use of replica ceramics as supports for active materials, for example, in catalysis applications.
Keywords
replica technique, ice templating, freeze casting, alumina foams, hierarchial porosity, zeolites
Active oxidation protection coatings for Mo-Si-B high-temperature materials
Duration: 01.12.2018 bis 01.12.2020
The aim of this project is to develop a coating system to build up complex functions for the effective component protection of Mo-Si-B alloys; this system consists of an oxygen-free preceramic polymer of the polysilazane type that can be processed in air and filled with ceramic and/or metallic particles. The fillers have three functions: to increase the coating thickness compared to the unfilled coating system; to reduce the shrinkage of the coating material caused by the transition from polymer to ceramic; and to form new phases by reaction between the preceramic polymer, filler and component(s) and the service atmosphere, which should compensate for a possible volume change due to abrasive/oxidative processes on the (coated) component surface (volume expansion of the fillers when oxygen is absorbed). Phase analysis, composition and state are determined using X-ray diffraction (XRD; Rietveld analyses are carried out if there are significant proportions of crystalline phases).
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Polymerabgeleitete keramische Schutzschichten
Duration: 01.07.2016 bis 30.11.2020
Ziel dieses Projektes ist die Entwicklung eines Beschichtungssystems zum Aufbau komplexer Funktionen für den effektiven Bauteilschutz von Mo-Si-B-Legierungen; dieses System besteht aus einem sauerstofffreien präkeramischen Polymer vom Polysilazantyp, das sich an Luft verarbeiten und mit keramischen und/oder metallischen Partikeln füllen lässt. Die Füllstoffe haben drei Funktionen: die Erhöhung der Schichtdicke im Vergleich zum ungefüllten Beschichtungssystem; die Reduzierung der durch den Übergang vom Polymer zur Keramik bedingten Schwindung des Schichtwerkstoffs und die Bildung neuer Phasen durch Reaktion zwischen präkeramischem Polymer, Füllstoff und Komponente(n) und der Serviceatmosphäre, die eine mögliche Volumenänderung durch abrassive/oxidative Prozesse an der (beschichteten) Bauteiloberfläche kompensieren sollen (Volumenausdehnung der Füllstoffe bei Aufnahme von Sauerstoff). Phasenanalyse, -zusammensetzung und -zustand werden mittels Röntgendiffraktometrie erfasst (XRD; bei Vorliegen nennenswerter Anteile kristalliner Phasen werden Rietveld-Analysen durchgeführt).
Ceramic foams with specifically adjusted surface energy
Duration: 01.07.2015 bis 31.12.2019
The work deals with the targeted adjustment of the surface properties of ceramic foams. The variation from hydrophilic to hydrophobic opens up new application possibilities for cellular ceramics, for example in chemical process engineering in the field of mass transfer. As part of the project, ceramic foams with different surface energy and wettability are being developed as reactor internals and investigated in multiphase, immiscible systems with a focus on the mass transfer efficiency of the phases involved.
The surface properties of the open-pored ceramic foams are specifically adjusted by coating them with polysiloxanes, whose surface chemical and physical properties can be adjusted by heat treatment (temperature, time, atmosphere). This allows the wetting with fluid media of different polarities to be influenced. The change in the contact angle between the foam surface and the fluid medium serves as a measure of wetting, for which comparative tests are carried out on planar, concave and convex reference samples and attributed to the properties of the curved surfaces of the foam webs.
The application-oriented testing of the foams is carried out using liquid-liquid reactive extraction as a static mixer and its influence on phase dispersion. Depending on the surface properties of the cellular materials, the foam structures are intended to intensify phase dispersion. The figure shows the schematic structure of the liquid-liquid extraction system with the ceramic foams as mixer inserts.
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Oxide ceramic foams with increased mechanical strength
Duration: 01.10.2014 bis 30.09.2018
Ceramic foams are used in numerous technical applications, e.g. as molten metal filters, as thermal insulation or as bone replacement materials. The process-related hollow structure of their webs leads to a comparatively low mechanical strength.
In order to increase the strength of oxide ceramic foams, novel multiple coating and infiltration strategies with particulate and molecular precursors and their consolidation in the ceramic foam were developed. It was shown that both the infiltration and coating of aluminum oxide and the infiltration and thermal conversion of zirconium-containing compounds have a positive effect on the mechanical strength of ceramic foams without significantly influencing the porosity. In [1] it was shown that the strength of ZTA foams can be increased by infiltration to 2.66 MPa at a porosity P of 86 % and by multiple coating to over 11 MPa (P = 59 %).
References
[1] X. Chen, U. Betke, S. Rannabauer, P. Peters, G. Söffker, M. Scheffler, Improving the strength of ZTA foams with different strategies - immersion infiltration and recoating; Materials 10 (2017) 735.
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Active oxidation protection coatings for Mo-Si-B high-temperature materials
Duration: 01.07.2016 bis 30.06.2018
High-temperature resistant Mo-Si-B materials are being intensively investigated as suitable substitutes for nickel-based materials. One problem with these materials that has not yet been solved is their oxidation behavior. The Mo solid solution phase in particular oxidizes catastrophically depending on the temperature, forming a volatile Mo oxide. It has not yet been possible to solve this problem with known protective coating systems.
The aim of the project is to develop a new type of active protection system based on preceramic polymers and fillers. To this end, a material concept is being developed in which oxygen from the working atmosphere is absorbed by a protective layer and reactively converted into a component of a diffusion protection layer, which in turn significantly reduces oxygen diffusion in the direction of the metal surface to be protected.
In addition to developing the coating and material system and gaining an understanding of its operating principle, the investigations also include application-related studies on the protective effect in oxidizing (working) atmospheres. The project is being carried out in cooperation with Prof. Dr. Manja Krüger, RWTH Aachen University. Initial investigations into reaction pathways and the protective effect have been very promising and have been published in [1].
References
[1] I. Smokovich, Georg Hasemann, Manja Krüger, Michael Scheffler, Polymer derived oxidation barrier coatings for Mo-Si-B Alloys; Journal of the European Ceramic Society 37 (2017) 4559-4565.
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NEOTHERM: Novel composite materials for energy storage and heat pump applications
Duration: 01.06.2013 bis 31.05.2018
The BMBF junior research group NEOTHERM deals with the production of novel functional materials based on ceramic foams with active layers of microporous compounds (zeolites, metal-organic framework compounds) for sorptive energy storage or for heat pump applications. Current work focuses on the development/further development of cellular metallic and ceramic carrier materials with large and, above all, accessible surfaces and their coating with metal-organic framework compounds (MOFs) as active components. Direct crystallization processes and conventional coating processes are being investigated.
The main issues in carrier development are increasing the thermal and electrical conductivity of the web material, optimizing the pore geometry for mass transport and functionalizing the carrier surface for the best possible bonding of the active layer. For the latter point, trialkoxysilanes have proven their worth, and it has been possible to apply well-bonded active layers of the MOFs MIL-101(Cr), UiO-66(Zr) and HKUST-1 to Al2O3 and SiC foams.
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High-density polymer-derived ceramics with carbon nanotube reinforcement
Duration: 01.01.2015 bis 31.12.2017
High-performance ceramics are used in a variety of industrial applications due to their special range of properties (high temperature resistance, wear resistance and hardness). However, with an inherently low crack toughness, there is a malus in terms of reliability for technical use.
The crack toughness can be increased by adding reinforcing phases. Carbon nanotubes (CNTs) have this property, but homogeneous distribution of commercially available CNTs in ceramic matrices is time-consuming and energy-intensive.
In a novel approach, CNTs are formed in the presence of a transition metal catalyst during the conversion of a preceramic polymer into a polymer-derived ceramic. The hydrocarbons released during the conversion and coming into contact with the catalyst are used to form CNTs in situ. Thus, CNT-containing ceramics can even be produced in a hydrocarbon-free atmosphere, bypassing the problems mentioned above.
The CNT-containing ceramics are ground in a second process step and compacted using a field-assisted sintering process. The temperatures are typically around 1600 °C in order to obtain compact, almost pore-free ceramics. This in turn leads to a process known as carbothermal reduction, whereby the CNTs are partially converted into SiC. In order to achieve a reduction of the sintering temperature below the starting temperature of the carbothermal reduction, further additives and nanoparticulate fillers were introduced into the preceramic polymer. It was shown that the sintering temperature for producing a compact ceramic can be lowered by more than 150 °C and thus the carbothermal reduction can be largely suppressed. This results in compact bodies with a significantly higher theoretical density compared to their boron-free counterparts, which also have significantly higher strengths due to their lower porosity.
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Novel functional ceramics with increased crack toughness
Duration: 01.01.2015 bis 31.12.2016
Ceramics are used in many industrial applications due to their temperature resistance, wear resistance and hardness. However, they have a naturally low crack resistance. This is an obstacle to many applications.
Crack resistance can be increased by adding a reinforcing phase with a high aspect ratio. Carbon nanotubes (CNTs) have this property, but they are expensive and can only be incorporated homogeneously into ceramic materials at great expense.
In a completely new approach, CNTs are formed in the presence of a transition metal catalyst during the conversion of a preceramic polymer into a polymer-derived ceramic. The hydrocarbons released during the conversion and coming into contact with the catalyst are used to form CNTs in situ. In this way, CNT-containing ceramics can be produced without the need for hydrocarbons in the process gas. This process can also be used to produce CNT coatings, e.g. on carbon fibers. The high porosity of this composite material made of polymer-derived ceramic and the CNTs after the first process stage is then largely eliminated by field-active sintering; the advantage of this process is the short process time at high temperatures, which allows the CNTs to retain their structure and bond to the polymer-derived matrix. This results in significantly higher fracture toughness.
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Polymer-derived ceramics with negative thermal expansion
Duration: 01.07.2015 bis 30.06.2016
Negative thermal expansion materials are developed on the basis of preceramic polymers that are loaded with fillers with a negative coefficient of thermal expansion (NTE) and converted into polymer-derived ceramics in a downstream heat treatment (pyrolysis). The NTE materials used are β-eucryptite and zirconium tungstate. The knowledge gained about the properties of the completely new material is used in the development of coatings, whereby the layer formation takes place via a dip coating process.
The large difference between the expansion coefficients of the two material components leads to residual stresses in the composite material, which cause cracking and pore formation. Using numerical simulation, these stresses between the matrix and particle material can be quantified and their influence on the mechanical properties of the resulting material can be estimated.
SEM image of a composite material with 50 % by volume β-eucryptite, after pyrolysis at 800 °C (left) and results of the simulation of stress distributions (right)
If the production of stable NTE layers on high-temperature stable materials is successful, such systems can lead to new applications in temperature-stressed components where, for example, heat flow plays an important role.
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Polymer-derived ceramic protective coatings on Ti alloys
Duration: 01.10.2015 bis 31.03.2016
Corrosion processes lead to immense economic damage every year, estimated at around USD 8 billion. Effective corrosion protection can be achieved using numerous coating processes. One of these comparatively new processes makes use of preceramic polymers in combination with ceramic and/or metallic fillers. The advantage lies in the use of comparatively inexpensive coating application processes such as spray, dip or centrifugal coating and the ability to coat even geometrically complex workpieces. The conversion of the (filler-containing) preceramic polymer layers into ceramic layers takes place in the temperature range from 800 °C to 1400 °C.
To protect titanium alloys, a perhydropolysilazane (PHPS) filled with SiC, h-BN, TiSi2+B or Si3N4 was applied to Ti-6Al-4V by dip coating, pyrolyzed in argon at temperatures below 1000 °C and then subjected to a corrosion test at 800 °C for 80 hours. Some of the coatings showed slight changes in mass or high resistance to corrosion.
These current results form the basis for investigations into the individual reaction steps during oxidation and oxidation protection. Follow-up investigations are initially dedicated to thermodynamic considerations and finally to the experimental further development of protective coatings based on preceramic polymers.
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Novel functional ceramics with improved crack toughness
Duration: 01.07.2012 bis 31.12.2014
The aim of the work is to develop a new type of ceramic material based on preceramic polymers. In addition to reduced porosity and increased strength, the new material should above all have significantly higher crack resistance. This is to be achieved by introducing carbon nanotubes (CNTs) into the ceramic matrix. In a novel approach, CNTs are to be formed directly during the thermal conversion of preceramic polymers in the matrix material in the presence of a transition metal catalyst and bonded to the matrix in a second process step by field-assisted sintering. The microstructure of the nanocrystalline material should be retained, which leads to a significant increase in crack toughness compared to CNT-free materials.
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Cellular materials and components (ego. incubator)
Duration: 01.07.2011 bis 30.06.2014
Innovative start-ups through a closed process chain for the production of cellular materials and components The installation of an incubator is intended to give students, graduates, scientific staff at OvGU and employees of other scientific institutions in the state of Saxony-Anhalt the opportunity to understand the entire process chain for the production of cellular ceramics and glasses for the first time, from component design and assembly to the non-destructive, three-dimensional characterization of the finished product in all steps.
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Netzartig strukturierte Oberflächen aus präkeramischen Polymeren
Duration: 01.11.2009 bis 31.12.2012
Ziel des Vorhabens ist die Herstellung von polymeren und keramischen, strukturierten Beschichtungen mit großer spezifischer Oberfläche auf Metall- und Keramiksubstraten. Die Schichten werden aus Si-organischen Polymer-Lösungsmittel-Systemen generiert. Die Strukturierung der Schichten erfolgt über Entmischungs- und Entnetzungsprozesse zwischen organischer Lösungsmittel- und Si-organischer Polymerkomponente, die zu netzartigen Strukturen führen. Das Verhältnis von unbeschichteter zu beschichteter Fläche, die Schichtdicke und die Morphologie der Strukturen werden dabei über chemische und physikalische Eigenschaften des Systems, die Schichtdicke und die Trocknungsbedingungen gesteuert. Die Erkenntnisse zur Strukturbildung als Funktion von Polymereigenschaften, Zusammensetzung und Prozessparametern dienen der Beschreibung der Zusammenhänge bei der Strukturbildung.
Polymerabgeleitete Keramiken im System Si-O-C-Ta
Duration: 01.09.2009 bis 31.12.2012
Präkeramische Polymere bieten bei der Herstellung von Keramiken gegenüber konventionellen Prozessrouten zahlreiche Vorteile wie z. B. die Nutzung von Formgebungsverfahren aus der Kunststoffverarbeitung, die stufenlose Einstellung von Eigenschaftsprofilen oder die thermische Umwandlung bei vergleichsweise niedrigen Temperaturen. Diese Vorteile werden bei der Bearbeitung dieses Projekts genutzt. Ziel ist zunächst, die chemischen Reaktionen zwischen präkeramischen Polymeren vom Polysiloxantyp mit partikulären Tantal-Füllstoffen (Ta, TaC) und die resultierenden Komponenten der entstandenen Kompositkeramiken zu identifizieren und die neuartigen Werkstoffe zu charakterisieren. Die Ergebnisse aus diesen Untersuchungen bilden die Grundlage zu weiterführenden Untersuchungen für Ta-haltige Schichten auf Hochtemperaturwerkstoffen, die mittels einfacher Verfahren (Tauchbeschichtung, Sprühbeschichtung) appliziert werden.
Effiziente Hochtemperatur-Rekuperatoren durch neue Werkstoffpaarung: ERNA
Duration: 01.11.2010 bis 31.10.2012
Gesamtziel des Verbundprojekts ist es, einen Hochtemperatur-Rekuperator mit verbesserter Wärmeübertragung auf Basis keramischer Füllungen zu entwickeln. Für die Erreichung dieses Zieles werden a) keramische Funktionsschutzschichten entwickelt, die eine Reaktion zwischen Rekuperatorwerkstoff und Rahmenwerkstoff selbst bei hohen Temperaturen unterbinden, b) Auslegungen für ein neuartiges Rekuperaturdesign durchgeführt und c) Funktionsmuster aufgebaut und unter Einsatzbedingungen getestet. Die Energieeffizienz der Funktionsmuster soll durch Erhöhung der Einsatztemperaturen über den gegenwärtigen Stand der Technik der Luftvorwärmung in Rekuperatoren deutlich hinausgehen.
Zur Erlangung dieses Gesamtziels hat sich ein Konsortium zusammengefunden, das unter Verknüpfung der Ergebnisse und Verzahnung der Arbeiten die folgenden Teilaufgaben bearbeitet:
Entwicklung einer Wärmeübertragerwerkstoff-Schutzschicht (Teilprojekt I), Entwicklung einer Gehäusewerkstoffschutzschicht (Teilprojekt II), Auslegung des Rekuperators, Testung und Funktionsmuster (Teilprojekt III) sowie Entwurf, Bau und Testung des Funktionsmusters (Teilprojekt IV).
Durch Erhöhung der Arbeitstemperaturen auf über 1000 °C wird eine deutliche Erhöhung der Energieeffizienz, verbunden mit einer drastischen Reduzierung der CO2-Emissionen bei thermischen Prozessen mit Wärmerückgewinnung erwartet.
Mikro- und Nanohohlkugeln aus präkeramischen Polymeren
Duration: 01.11.2009 bis 31.05.2012
Ziel des Vorhabens ist die Herstellung von polymeren und keramischen Mikro- und Nanohohlkugeln mit enger Durchmesser- und Wandstärkenverteilung. Die Kugeln werden über Verfahren ähnlich der Herstellung von Emulsionen/multiplen Emulsionen im Materialsystem Polysiloxan-Tensid-äußere (wässrige) Phase hergestellt mit der Besonderheit, dass nach dem Emulsionsprozess die innere bzw. mittlere, aus einem präkeramischen Polymer bestehende Phase einen flüssig-fest-Übergang durchläuft. Die geometrischen Eigenschaften der Kugeln werden mit Hilfe von Tensiden und Tensidgemischen sowie mit Hilfe der äußeren Phase gesteuert. Die Einstellung der chemischen, mechanischen und thermischen Eigenschaften erfolgt über die Zugabe von Füllstoffen sowie über die Parameter der thermischen Umwandlung zur Keramik. Es werden Zusammenhänge abgeleitet, mit deren Hilfe der Prozess der geometrischen Strukturbildung beschrieben und auf weitere Systeme übertragen werden kann.
Neuartige Aluminiumoxid-Mullit-Werkstoffe für Feuerfestanwendungen: Herstellung und Steuerung der Mikrostruktur (Teilprojekt im SPP 1418: Feuerfest - Initiative zur Reduzierung von Emissionen)
Duration: 01.04.2009 bis 31.03.2012
Ziel des Vorhabens ist die Herstellung von thermoschockbeständigen Feuerfest-Keramiken auf der Basis des zweiphasigen Systems Alumiuniumoxid/Mullit über sol-gel-Prozesse mit partikulär gefüllten Solen. Dabei dient das Sol-System auf Basis niedrigmolekularer SiO2-Vorläuferstufen während der Formgebung über Gießprozesse als Matrix- und Transportmedium für Aluminiumoxid-Partikel und nach dem flüssig-fest-Übergang während der thermischen Behandlung als SiO2-Quelle für die in-situ-Bildung der Zweit-(Matrix-)phase Mullit. Die Bildung von Mullit erfolgt dabei an der Grenzfläche zwischen der Matrix und der Al2O3-Partikelphase, resultierend in einer Kern-Schale-Struktur mit verbesserten thermomechanischen Eigenschaften. Der Anteil beider Phasen wird über die Zusammensetzung des Gießschlickers und die Parameter der thermischen Umwandlung im Temperaturbereich zwischen 1200 °C und 1500 °C gesteuert. Die Ergebnisse der Mikrostruktur- und Festkörpercharakterisierung werden mit den Ergebnissen der Hochtemperatur- und Thermoschockuntersuchungen korreliert und Struktur-Eigenschaftsbeziehungen aufgezeigt, mit deren Hilfe die Werkstoffeigenschaften gezielt eingestellt werden können.
Cellular ceramics with tailored bimodal porosity
Duration: 01.01.2009 bis 31.12.2010
Keramische Schäume, insbesondere solche mit hierarchisch aufgebauter Porenstruktur gewinnen zunehmend für ingenieurtechnische Anwendungen wie Sorption, Katalyse, Gastrennung und Wärmespeicherung/Wärmetransformation an Bedeutung. Dabei begünstigen makroskopische Schaumzellen den fluiden Stofftransport, während Meso- und Mikroporen die katalytische oder Sorptionsfunktionalität darstellen bzw. durch Aufnahme von Gastkomponenten eine weitere Möglichkeiten zur Funktionalisierung bieten. Die Ziele dieser Arbeiten sind folglich: i) zellulare keramische Monolithe mit definierten Porosität im Mikrometerbereich zu versehen,ii) Erkenntnisse zur Bildung dieses Funktionsporentypus zu erlangen sowie iii) Korrelationen zwischen bimodaler Porosität und mechanischen Werkstoffeigenschaften aufzuzeigen. Im Rahmen des Projekts werden polymerabgeleitete Keramikschäume nach bekannten Verfahren hergestellt und simultan durch Zusatz ausbrennbarer Platzhalter gezielt mit einer Stegporosität versehen. Die Charakterisierung erfolgt hinsichtlich der (makroskopischen) Zellmorphologie, der Porosität in den Stegen und der mechanischen Eigenschaften. Zur Charakterisierung werden Computertomographie, verschiedene Methoden der Elektronenmikroskopie und Methoden der Porositäts- und mechanischen Charakterisierung monolithischer Festkörper herangezogen. Mit den gewonnenen Erkenntnissen wird der Einfluss der Stegporosität auf die mechanischen Eigenschaften beschrieben.
Layered Oxide thermoelectric materials
Duration: 01.09.2010 bis 30.11.2010
The growing concern over increasing energy cost and global warming associated with fossil fuel source has stimulated the search for cleaner, more sustainable energy sources. Among viable technologies, the thermoelectric (TE) material based devices have received much attention. The main advantages of the TE devices are solid state operation, zero emission, high scalability, no maintenance cost and long operating life. However, TE materials, though known for long time have been too inefficient to be cost effective in most of the applications. Hence to increase the efficiency, the electrical conductivity hast o be increased while maintaining the thermal conductivity to a minimum. One of the most promising candidates is SrTiO3 showing a very high ZTvalue, which is a measure for the efficiency of a TE genrator. Aim of this project ist o develop a processing route for coating of a substrate material with SrTiO3 and doped relativ materials. Within this work a strategy will be developed for future work and process improvement.
Thermisch, aktivierbare, keramische Schutzschichten mit adaptiven Eigenschaften auf Basis präkeramischer Polymere (Teilprojekt im SPP 1299: Adaptive Oberflächen für Hochtemperaturanwendungen)
Duration: 16.04.2007 bis 15.10.2010
Ziel des Vorhabens ist die Herstellung von keramischen, thermisch aktivierbaren Funktionsschichten auf Stahl, Kupfer und Titanlegierungen auf Basis sauerstofffreier Polysilazane und sauerstoffhaltiger Polysiloxane über einfache Beschichtungsverfahren. Über Zusammensetzung des Beschichtungssystems, Prozessparameter der Polymer-zu-Keramik-Umwandlung und Pyrolyseatmosphäre können die Eigenschaften der zu generierenden Schichten gezielt eingestellt werden. Im Rahmen dieses Projekts wird untersucht, inwieweit die die geometrische Struktur von Füllstoffpartikeln genutzt werden kann, um diese auf den Schichten abzubilden. Auf diese Weise sollen mikro- und nanostrukturierte Oberflächen geschaffen werden, die einen erweiterten Funktionsumfang aufweisen.
2024
Peer-reviewed journal article
Physicochemical conditions of boron-siliconizing of molybdenum-based alloys in chlorine and fluorine medium
Loskutova, Tetiana; Scheffler, Michael; Ivanov, Vitalii; Pohrebova, Inna; Kononenko, Yaroslav; Bobina, Maryna; Kharchenko, Nadiia; Bartoszuk, Marian; Pavlenko, Ivan
In: Metals - Basel : MDPI, Bd. 14 (2024), Heft 3, Artikel 302, insges. 17 S.
Corrosion resistance of coatings based on chromium and aluminum of titanium alloy Ti-6Al-4V
Loskutova, Tetiana; Scheffler, Michael; Pavlenko, Ivan; Zidek, Kamil; Pohrebova, Inna; Kharchenko, Nadiia; Smokovych, Iryna; Dudka, Oleksander; Palyukh, Volodymyr; Ivanov, Vitalii; Kononenko, Yaroslav
In: Materials - Basel : MDPI, Bd. 17 (2024), Heft 15, Artikel 3880, insges. 15 S.
Strength increase of alumina foams by a sodium aluminosilicate glass coating with subsequent Na+ ↔ K+ ion exchange (gorilla glass coating)
Betke, Ulf; Zander, Phillip Viet Duc; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 26 (2024), Heft 18, Artikel 2400521, insges. 8 S.
2023
Peer-reviewed journal article
Increased microporosity in ceramic and metal foams - a novel processing combination
Dammler, Kathleen; Sutygina, Alina; Scheffler, Franziska; Scheffler, Michael; Betke, Ulf
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 26 (2024), Heft 4, Artikel 2300799, insges. 9 S.
Processing of ceramics from polysil(sesquioxane)-type Precursors - coatings, tapes, tailored surfaces, and porosity control
Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 25 (2023), Heft 17, Artikel 2300290, insges. 12 S.
Effect of powder processing and sintering conditions on the microstructural, thermal, and mechanical properties of reticulated zinc oxide ceramic foams
Betke, Ulf; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 25 (2023), Heft 16, Artikel 2300459, insges. 13 S.
2022
Peer-reviewed journal article
Macrostructural design of highly porous SiOC ceramic foams by preceramic polymer viscosity tailoring
Li, Quan; Tsai, Chen-Chih; Scheffler, Michael; Joshi, Shiv; Bordia, Rajendra K.
In: Ceramics international - Amsterdam [u.a.] : Elsevier Science, Bd. 48 (2022), Heft 1, S. 224-231
Reticulated ceramic foams from alumina-chromia solid solutions - a feasibility study
Betke, Ulf; Schrake, Daniel; Scheffler, Michael
In: International journal of applied ceramic technology - Westerville, Ohio : Wiley-Blackwell, Bd. 19 (2022), Heft 1, S. 188-199
Modeling the oxidation of a polymer-derived ceramic with chemo-mechanical coupling and large deformations
Voges, Jannik; Smokovych, Iryna; Duvigneau, Fabian; Scheffler, Michael; Juhre, Daniel
In: Acta mechanica - Wien : Springer . - 2022, insges. 23 S. [Online first]
Reticulated open-cellular aluminum nitride ceramic foams - effect of sintering aids on microstructural, thermal, and mechanical properties
Betke, Ulf; Mendoza, Danielle Chazaro; Scheffler, Michael
In: International journal of applied ceramic technology - Westerville, Ohio : Wiley-Blackwell . - 2022, insges. 9 S. [Online first]
Effect of the cell count on geometrical, mechanical, and thermal properties of hierarchical-porous reticulated copper foams from a combination of sponge replication and freeze-drying techniques
Sutygina, Alina; Betke, Ulf; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 24 (2022), Heft 10, Artikel 2200230, insges. 7 S.
Manufacturing of open-cell aluminium foams - comparing the sponge replication technique and its combination with the freezing method
Sutygina, Alina; Betke, Ulf; Scheffler, Michael
In: Materials - Basel : MDPI, Bd. 15 (2022), Heft 6, Artikel 2147, insges. 14 S.
Dissertation
Manufacturing and characterization of open-cell metal foams with high strut porosity
Sutygina, Alina; Scheffler, Michael; Scheffler, Franziska
In: Magdeburg: Universitätsbibliothek, Dissertation Otto-von-Guericke-Universität Magdeburg, Fakultät für Maschinenbau 2022, 1 Online-Ressource (XIV, 134 Blätter, 10,97 MB) [Literaturverzeichnis: Blatt 115-129][Literaturverzeichnis: Blatt 115-129]
Einfluss der Topographie und Werkstoffcharakteristik des metallischen Reibgegenparts auf die Tribologie von geregelten, trockenlaufenden Kupplungssystemen in Fahrzeuganwendungen
Berkefeld, Joerg; Bartel, Dirk; Scheffler, Michael
In: Düren: Shaker Verlag, Dissertation Otto-von-Guericke-Universität Magdeburg 2022, XVI, 150 Seiten, Seite A1-A5 - (Fortschritte in der Maschinenkonstruktion; 2022, Band 1), ISBN: 3-8440-8512-2 [Literaturverzeichnis: Seite 143-150][Literaturverzeichnis: Seite 143-150]
Entwicklung eines dispersionsbasierten Druckverfahrens zur Herstellung von thermoelektrischen Mikroschichten
Künzel, Christian; Scheffler, Franziska; Scheffler, Michael; Sauerhering, Jörg
In: Magdeburg: Universitätsbibliothek, Dissertation Otto-von-Guericke-Universität Magdeburg, Fakultät für Verfahrens- und Systemtechnik 2022, 1 Online-Ressource (XII, 146, Seite IX-LXXVII, 98,21 MB) [Literaturverzeichnis: Seite XV-XLIII][Literaturverzeichnis: Seite XV-XLIII]
2021
Abstract
Biocompatibility of pure refractory metals and their combination as high entropy alloys
Schmelzer, Janett; Hasemann, Georg; Regenberg, Maximilian; Betke, Ulf; Krüger, Manja; Walles, Heike; Scheffler, Michael
In: Intermetallics 2021 - International Conference, 04-08 October 2021 : Educational Center Kloster Banz, Germany : programme and abstracts , 2021 - Jena, Germany : Conventus Congressmanagement & Marketing GmbH ; Krüger, Manja, S. 172-173, Artikel P-13 [Intermetallics 2021, International Conference, 4th till 8th October 2021 : Educational Center Kloster Banz, Germany]
Peer-reviewed journal article
Oxidation-resistant environmental barrier coatings for Mobased alloys - a review
Gatzen, Caren; Smokovych, Iryna; Scheffler, Michael; Krüger, Manja
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 23 (2021), Heft 4, Artikel 2001016
Open-cellular alumina foams with hierarchical strut porosity by ice templating - a thickening agent study
Dammler, Kathleen; Schelm, Katja; Betke, Ulf; Fey, Tobias; Scheffler, Michael
In: Materials - Basel : MDPI - Volume 14(2021), issue 5, article 1060, 14 Seiten
Hierarchicalporous copper foams by a combination of sponge replication and freezing techniques
Sutygina, Alina; Betke, Ulf; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 24 (2022), Heft 1, Artikel 2001516, insges. 12 S.
Refractory metal coated alumina foams as support material for stem cell and fibroblasts cultivation
Hasemann, Georg; Betke, Ulf; Krüger, Manja; Walles, Heike; Scheffler, Michael
In: Materials - Basel : MDPI, Bd. 14 (2021), Heft 11, Artikel 2813
Dissertation
Keramikschäume mit hoher Stegporosität
Dammler, Kathleen; Scheffler, Michael; Scheffler, Franziska
In: Magdeburg: Universitätsbibliothek, Dissertation Otto-von-Guericke-Universität Magdeburg, Fakultät für Maschinenbau 2021, 1 Online-Ressource (XVIII, 257 Seiten, 111,81 MB) [Literaturverzeichnis: Seite 181-202][Literaturverzeichnis: Seite 181-202]
2020
Abstract
Al2O3/Cu- und Cu-Retikulatschäume mit lamellar aufgebauten Stegen
Reissig, E.; Sutygina, Alina; Dammler, Kathleen; Schelm, Katja; Betke, Ulf; Scheffler, Michael
In: Zellulare Werkstoffe - DGM . - 2020 [14. Sitzung des DGM-Fachausschusses Zellulare Werkstoffe am 09.07.2020]
Manufacturing of reticulated copper foams - a method overview and techniques for creating additional strut porosity by a combined sponge replication and freezing technique
Sutygina, Alina; Scheffler, Michael
In: Zellulare Werkstoffe - DGM . - 2020 [14. Sitzung des DGM-Fachausschusses Zellulare Werkstoffe am 09.07.2020]
Peer-reviewed journal article
Preceramic polymer-derived ceramic foams with lamellar strut porosity
Dammler, Kathleen; Schelm, Katja; Kniep, D.; Hasemann, Georg; Scheffler, Michael
In: IOP conference series / Materials science and engineering / Institute of Physics - London [u.a.] : Institute of Physics - Vol. 882 (2020), Paper 012005, insgesamt 12 Seiten [Symposium: Symposium on Materials and Joining Technology, Magdeburg, Germany, 7-8 September 2020]
Ceramic oxidation protection coatings for refractory alloys from filler-loaded preceramic polymers - the role of particle size and volume fraction of particulate fillers
Smokovych, Iryna; Eley, H.; Bosiaha, M.; Scheffler, Michael
In: IOP conference series / Institute of Physics - London [u.a.] : Institute of Physics - Vol. 882 (2020), Paper 012021, insgesamt 9 Seiten [Symposium: Symposium on Materials and Joining Technology, Magdeburg, Germany, 7-8 September 2020]
Polymer derived ceramics from Si, B, SiB6, and Mo5SiB2 filler-loaded perhydropolysilazane precursors as protective and functional coatings for refractory metal alloys
Smokovych, Iryna; Gatzen, Caren; Krüger, Manja; Schwidder, Michael; Scheffler, Michael
In: Materials - Basel : MDPI - Vol. 13 (2020), 21, Article 4878, insgesamt 11 Seiten
Novel Al/Al2O3 composite foams by direct oxidation conversion
Chen, Xiadong; Sun, R.; Betke, Ulf; Scheffler, Michael
In: IOP conference series / Institute of Physics - London [u.a.] : Institute of Physics - Vol. 882 (2020), Paper 012003, insgesamt 11 Seiten [Symposium: Symposium on Materials and Joining Technology, Magdeburg, Germany, 7-8 September 2020]
Manufacturing of open-cell metal foams by the sponge replication technique
Sutygina, Alina; Betke, Ulf; Hasemann, Georg; Scheffler, Michael
In: IOP conference series / Institute of Physics - London [u.a.] : Institute of Physics - Vol. 882 (2020), Paper 012022, insgesamt 11 Seiten [Symposium: Symposium on Materials and Joining Technology, Magdeburg, Germany, 7-8 September 2020]
Cellular Nickel-Yttria/Zirconia (NiYSZ) cermet foams - manufacturing, microstructure and properties
Betke, Ulf; Schelm, Katja; Rodak, Andreas; Scheffler, Michael
In: Materials - Basel : MDPI - Volume 13 (2020), issue 11, article 2437, 14 Seiten
Cyclic oxidation behavior of MoAlB in the temperature range 450850 °C
Mou, Junji; Li, Shibo; Yao, Boxiang; Ma, Pengfei; Yu, Wenbo; Zhou, Yang; Smokovych, Iryna; Scheffler, Michael
In: Journal of alloys and compounds - Lausanne : Elsevier - Volume 831 (2020), Artikel 154802 [Online first]
Open-cell aluminum foams by the sponge replication technique - a starting powder particle study
Sutygina, Alina; Betke, Ulf; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 22 (2020), Heft 5, S. 1-8, Artikel 1901194
Dissertation
Oberflächenfunktionalisierte Keramikschäume für flüssig-flüssig-Reaktivextraktionen
Schelm, Katja; Scheffler, Michael
In: Magdeburg, Dissertation Otto-von-Guericke-Universität Magdeburg, Fakultät für Maschinenbau 2020, XVIII, 199 Seiten [Literaturverzeichnis: Seite 190-199][Literaturverzeichnis: Seite 190-199]
2019
Peer-reviewed journal article
Mechanical and surface-chemical properties of polymer derived ceramic replica foams
Schelm, Katja; Abreu Morales, Elena; Scheffler, Michael
In: Materials - Basel : MDPI - Volume12 (2019), issue11, article1870, insgesamt 16 Seiten
Cellular materials [Editorial]
Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl. - Vol. 21 (2019), 6, Artikel 1900449
Reticulated alumina replica foams with additional sub‐micrometer strut porosity
Carstens, Simon; Dammler, Kathleen; Scheffler, Michael; Enke, Dirk
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 21 (2019), Heft 12, Artikel 1900791
Open-cell aluminum foams by the sponge replication technique
Sutygina, Alina; Betke, Ulf; Scheffler, Michael
In: Materials - Basel : MDPI - Volume 12, issue 23 (2019), article 3840, insgesamt 12 Seiten
Tailoring of the wetting behavior of alumina dispersions on polymer foams by methylcellulose addition - a route toward mechanically stable ceramic replica foams
Schelm, Katja; Dammler, Kathleen; Betke, Ulf; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 21 (2019), Heft 12, Artikel 1900635
Tailored oxidation barrier coatings for Mo-Hf-B and Mo-Zr-B alloys
Smokovych, Iryna; Bolbut, Volodymyr; Krüger, Manja; Scheffler, Michael
In: Materials - Basel : MDPI - Volume 12 (2019), issue 14, article 2215, insgesamt 13 Seiten
Celebrating the 65th Birthday of Professor Peter Greil [Editorial]
Fey, Tobias; Scheffler, Michael; Travitzky, Nahum
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl. - Vol. 21 (2019), 6, Artikel 1900484
Refitting of zirconia toughening into open-cellular alumina foams by infiltration with zirconyl nitrate
Betke, Ulf; Scheunemann, Marcel; Scheffler, Michael
In: Materials - Basel : MDPI - Volume12 (2019), Issue 12, Artikel 1886, insgesamt 23 Seiten
Polymer derived ceramic materials from Si, B and MoSiB filler-loaded Perhydropolysilazane Precursor for oxidation protection
Smokovych, Iryna; Krüger, Manja; Scheffler, Michael
In: Journal of the European Ceramic Society - Amsterdam [u.a.] : Elsevier Science, Bd. 39 (2019), Heft 8, S. 3634-3642
Polymer derived ceramics with negative thermal expansion fillers - zirconium tungstate
Federova, Anna; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl. - Vol. 21 (2019), Artikel 1900116, insgesamt 4 Seiten [Online first]
Hierarchicalporous ceramic foams by a combination of replica and freeze technique
Schelm, Katja; Fey, Tobias; Dammler, Kathleen; Betke, Ulf; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl. - Vol. 21 (2019), 6, Artikelnummer 1802362
Reticulated open-celled zinc oxide ceramic foams - manufacturing, microstructure, mechanical, and thermal properties
Betke, Ulf; Scheffler, Michael
In: Advances in materials science and engineering - New York, NY : Hindawi - (2019), Article ID 6570180, insgesamt 10 Seiten
Newtype oxidation barrier coatings for titanium alloys
Smokovych, Iryna; Scheffler, Michael; Li, Shibo; Yao, Boxiang
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 22 (2020), Heft 4, Artikel 1901224
2018
Abstract
Manufacturing of open-celled aluminum foams by the sponge replication technique
Sutygina, Alina; Betke, Ulf; Scheffler, Michael
In: CellMAT 2018 - Sankt Augustin, Germany : Deutsche Gesellschaft für Materialkunde e.V./German Materials Society, c/o INVENTUM GmbH ; Scheffler, Michael [Kongress: 5th Cellular Materials, Bad Staffelstein, Bavaria (Germany), 24-26 October 2018]
Freeze cast alumina foams with hierarchical strut porosit
Dammler, Kathleen; Schelm, Katja; Fey, Tobias; Betke, Ulf; Scheffler, Michael
In: CellMAT 2018 , 2018 - Sankt Augustin, Germany : Deutsche Gesellschaft für Materialkunde e.V./German Materials Society, c/o INVENTUM GmbH ; Scheffler, Michael [Kongress: 5th Cellular Materials, Bad Staffelstein, Bavaria (Germany), 24-26 October 2018]
Peer-reviewed journal article
Polymer-derived ceramic tapes with small and negative thermal expansion coefficients
Federova, Anna; Michelsen, L.; Scheffler, Michael
In: Journal of the European Ceramic Society - Amsterdam [u.a.] : Elsevier Science, Bd. 38 (2018), Heft 2, S. 719-725
Particle-filled polymer derived ceramic coatings on titanium alloy Ti-6Al-4V
Smokovych, Iryna; Scheffler, Michael
In: Advanced materials letters - Allahabad : VBRI Press, Bd. 9 (2018), Heft 1, S. 66-70
Reduction of the sintering temperature for the manufacturing of carbon-rich dense SiOC bulk ceramics
Mantzel, Niko; Schröckert, Felix; Bucharsky, Ethel Claudia; Schell, Karl Guenter; Hoffmann, Michael J.; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 20 (2018), Heft 10, Artikel 1800369, insges. 5 S.
MOFs meet macropores - dynamic direct crystallization of the microporous aluminum isophthalate CAU-10 on reticulated open-cellular alumina foams
Betke, Ulf; Klaus, Michael; Eggebrecht, Jakob G.; Scheffler, Michael; Lieb, Alexandra
In: Microporous and mesoporous materials - Amsterdam [u.a.] : Elsevier, Bd. 265 (2018), S. 43-56
Polysilazane-type coatings on Mo-Si-B alloys - a thermodynamic assessment of the phase composition
Smokovych, Iryna; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl. - Vol. 20.2018, 5, Art. 1700936
Non-peer-reviewed journal article
Funktionalisierungsstrategien für keramische Replika-Schäume
Betke, Ulf; Scheffler, Michael
In: Dialog - [Lampertheim] : IWV . - 2018, S. 46-52
2017
Book chapter
Hochleistungskeramiken für nachhaltige Wärmespeicherung und Kälteerzeugung
Betke, Ulf; Lieb, Alexandra; Rannabauer, Stefan; Scheffler, Franziska; Scheffler, Michael
In: Hochleistungskeramik 2017 / Deutsche Gesellschaft für Materialkunde e. V. - Lampertheim : ALPHA Informationsgesellschaft mbH ; Deutsche Gesellschaft für Materialkunde e. V., S. 22-27
Keramische Schäume - Herstellung und Funktionalisierung
Schelm, Katja; Dammler, Kathleen; Chen, X.; Betke, Ulf; Rannabauer, Stefan; Scheffler, Michael
In: 16. Sommerkurs Werkstoffe und Fügen - Magdeburg, 08. und 09. September 2017 , 2017 , korrigierte Auflage - Magdeburg : Universitätsbibliothek ; Mook, Gerhard, S. 207-216
Ein nachhaltiger Baustein im Fundament unseres Energiehaus(halt)es - Wärmespeicherung und Wärmetransformation
Betke, Ulf; Lieb, Alexander; Rannabauer, Stefan; Scheffler, Franziska; Scheffler, Michael
In: 16. Sommerkurs Werkstoffe und Fügen - Magdeburg, 08. und 09. September 2017 , 2017 , korrigierte Auflage - Magdeburg : Universitätsbibliothek ; Mook, Gerhard, S. 31-38
Peer-reviewed journal article
Polymer derived ceramics with β-eucryptite fillers - a novel processing route to negative and near zero expansion materials
Fedorova, Anna; Hourlier, Djamila; Scheffler, Michael
In: Ceramics international - Amsterdam [u.a.] : Elsevier Science, Bd. 43 (2017), Heft 5, S. 4483-4488
Polymer derived ceramics with β-eucryptite fillers - filler-matrix interactions
Fedorova, Anna; Betke, Ulf; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 19 (2017), Heft 6, Artikel 1700079
Impact of slurry composition on properties of cellular alumina - a computed tomographic study
Betke, Ulf; Dalicho, Sebastian; Rannabauer, Stefan; Lieb, Alexandra; Scheffler, Franziska; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 19 (2017), Heft 10, Artikel 1700138
Polymer derived oxidation barrier coatings for Mo-Si-B alloys
Smokovych, Iryna; Hasemann, Georg; Krüger, Manja; Scheffler, Michael
In: Journal of the European Ceramic Society - Amsterdam [u.a.] : Elsevier Science, Bd. 37 (2017), Heft 15, S. 4559-4565
Improving the strength of ZTA foams with different strategies - immersion infiltration and recoating
Chen, Xiaodong; Betke, Ulf; Rannabauer, Stefan; Peters, Paul; Söffker, Gerrit; Scheffler, Michael
In: Materials - Basel : MDPI, Bd. 10 (2017), Heft 7, S. 735
Tailored surface properties of ceramic foams for liquid multiphase reactions
Schelm, Katja; Schwidder, Michael; Samuel, Janis; Scheffler, Franziska; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 19 (2017), Heft 10, Artikel 1700418
Reticulated replica ceramic foams - processing, functionalization, and characterization
Fey, Tobias; Betke, Ulf; Rannabauer, Stefan; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 19 (2017), Heft 10, Artikel 1700369, insges. 15 S.
Increased mechanical stability and thermal conductivity of alumina reticulated porous ceramics (RPC) by nanoparticle infiltration processing
Rannabauer, Stefan; Söffker, Gerrit-Maximilian; Scheunemann, Marcel; Betke, Ulf; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl. - Vol. 19.2017, 10, Art. 1700211, insgesamt 9 S. [Special Issue: Cellular Materials]
Editorial for the Special Issue "Cellmat 2016"
Andersen, Olaf; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 19 (2017), Heft 10, Artikel 1700749, insges. 1 S.
2016
Book chapter
Surgical modelling of the human ear by rapid prototyping (workflow and material properties)
Vorwerk, Ulrich; Hahne, Cornelia; Scheffler, Michael; Klink, Fabian; Grote, Karl-Heinrich
In: Proceedings of the 8th International Conference on Business and Technology Transfer (ICBTT 2016) - December 1-3, 2016, Otto-von-Guericke-University Magdeburg, Germany - Tokyo : Japan Society of Mechanical Engineers ; Watanuki, Keiichi, S. 15-26
Peer-reviewed journal article
Rheology and crosslinking of a low-viscosity SiOC preceramic polymer
Reschke, Verena; Bordia, Rajendra K.; Scheffler, Franziska; Scheffler, Michael
In: Ceramics international - Amsterdam [u.a.] : Elsevier Science . - 2016
Manufacturing of reticulated open-cellular aluminum nitride ceramic foams from aqueous AlN suspensions
Betke, Ulf; Lieb, Alexandra; Scheffler, Franziska; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 19 (2017), Heft 3, Artikel 1600660, insges. 8 S.
A comparison of processing properties of Anatomic Facsimile Models (AFM) of the temporal bone with original human bone structures
Hahne, Cornelia; Scheffler, Michael; Dietze, Gabriele; Döring, Joachim; Klink, Fabian; Vorwerk, Ulrich
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl, Bd. 18 (2016), Heft 7, S. 1106-1112
Micro-macroporous composite materials - SiC ceramic foams functionalized with the metal organic framework HKUST-1
Betke, Ulf; Proemmel, Steven; Eggebrecht, Jakob G.; Rannabauer, Stefan; Lieb, Alexandra; Scheffler, Michael; Scheffler, Franziska
In: Chemie - Ingenieur - Technik - Weinheim : Wiley-VCH Verl., Bd. 88 (2016), Heft 3, S. 264-273
A novel processing route for alumina/mullite-based refactory materials
Betke, Ulf; Reschke, Kirsten; Scheffler, Michael
In: Refractories worldforum - Baden-Baden : Göller, Bd. 8 (2016), Heft 2, S. 81-85
Study of Phase Decomposition in ZrW2O8
Fedorova, Anna; Kämpf, Timo; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 18 (2016), Heft 7, S. 1118-1122
Manufacturing of an electrically conducting cellular Cu-SiC material by metal salt infiltration and chemical reduction (MESCAL)
Betke, Ulf; Sharma, Kashyapa S. K.; Rodak, Andreas; Rannabauer, Stefan; Lieb, Alexandra; Scheffler, Franziska; Scheffler, Michael
In: Materials letters - New York, NY [u.a.] : Elsevier, Bd. 185 (2016), S. 201-203
Silane functionalized open-celled ceramic foams as support structure in metal organic framework composite materials
Betke, Ulf; Proemmel, Steven; Rannabauer, Stefan; Lieb, Alexandra; Scheffler, Michael; Scheffler, Franziska
In: Microporous and mesoporous materials - Amsterdam [u.a.] : Elsevier, Bd. 239 (2016), S. 209-220
2015
Book chapter
Eigenschaften und Stabilität von ZrW208 und ZrW208-haltigen Verbundwerkstoffen bei hohen Temperaturen
Fedorova, Anna; Kämpf, Tino; Scheffler, Michael
In: Smart, effizient, mobil - 12. Magdeburger Maschinenbau-Tage ; 30. September und 1. Oktober 2015 , 2015 - Magdeburg : Otto-von-Guericke-Universität Magdeburg
Polysilazane-type PDC coatings on titanium metal
Smokovych, Irina; Scheffler, Michael
In: Smart, effizient, mobil - 12. Magdeburger Maschinenbau-Tage ; 30. September und 1. Oktober 2015 , 2015 - Magdeburg : Otto-von-Guericke-Universität Magdeburg
Kohlenstoffnanoröhren auf geometrisch einfachen und komplexen Trägerstrukturen
Mantzel, Niko; Reissig, Eric; Betke, Ulf; Rannabauer, Stefan; Scheffler, Michael
In: Smart, effizient, mobil - 12. Magdeburger Maschinenbau-Tage ; 30. September und 1. Oktober 2015 , 2015 - Magdeburg : Otto-von-Guericke-Universität Magdeburg
Peer-reviewed journal article
Microstructure and tribological properties of electrolytic plasma nitrided high-speed steel
Skakov, Mazhyn; Rakhadilov, Bauyrzhan; Scheffler, Michael; Batyrbekov, Erlan
In: Materials testing - München : Hanser, Bd. 57 (2015), Heft 4, S. 360-364
2014
Book chapter
Ramanspektroskopie in der Materialografie nichtmetallischer Werkstoffe
Fedorova, Anna; Mantzel, Niko; Frömert, J.; Peters, C.; Reissig, E.; Rannabauer, Stefan; Betke, U.; Lieb, A.; Scheffler, Michael
In: 15. Sommerkurs Werkstoffe und Fügen. - Magdeburg : Univ., S. 229-236, 2014Kongress: Sommerkurs Werkstoffe und Fügen; 15 (Magdeburg) : 2014.09.12-13
Werkstoffe
Scheffler, Michael; Halle, Thorsten; Krüger, Manja; Heyn, Andreas
In: Integrated Design Engineering - Ein interdisziplinäres Modell für die ganzheitliche Produktentwicklung / Vajna , Sándor - Berlin, Heidelberg : Springer Vieweg ; Vajna, Sándor *1952-* . - 2014, S. 199-238
Development of a manufacturing process of temporal bone surgery models using rapid prototyping
Karpuschewski, Bernhard; Döring, Joachim; Scheffler, Michael; Dietze, Gabriele; Vorwerk, Ulrich; Hahne, Cornelia; Klink, Fabian
In: Advanced materials research - Zug: Scitec Publ, Bd. 907.2014, S. 241-252
Ceramics for sustainable energy technologies with a focus on polymer-derived ceramics
Konegger, Thomas; Torrey, Jessica; Flores, Octavio; Fey, Tobias; Ceron-Nicolat, Bruno; Motz, Günter; Scheffler, Franziska; Scheffler, Michael; Greil, Peter; Bordia, Rajendra K.
In: Novel Combustion Concepts for Sustainable Energy Development / Agarwal , Avinash K. - New Delhi : Springer India ; Agarwal, Avinash K. . - 2014, S. 501-533
Peer-reviewed journal article
A novel approach for the processing of advanced polymer derived ceramics with carbon nanotubes with the help of pores
Mantzel, Niko; Rannabauer, Stefan; Bucharsky, Ethel C.; Schell, Karl G.; Hoffmann, Michael J.; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 16.2014, 3, S. 295-300
Editorial "Dear Readers of AEMs Special Issue "Cellular Materials"
Stephani, Günter; Scheffler, Michael
In: Advanced engineering materials. - Weinheim : Wiley-VCH Verl, Bd. 16.2014, 3, S. 271
Editor
Special issue: cellular materials
Stephani, Günter; Scheffler, Michael
In: 2014, Online-Ressource - (Advanced engineering materials; 16.2014, 3)
Scientific monograph
Zukunftspotenziale von Hochleistungskeramiken - Expertenstudie
Scheffler, Michael
In: Köln [u.a.]: DKG [u.a.], 2014, 66 S., ISBN: 978-3-00-045777-7
2013
Book chapter
Modification of stainless steels surface layers by nitriding and carbonitriding
Skakov, zhyn; Kurbanbekov, Sherzod; Scheffler, Michael; Naltaev, Azretay
In: Advanced materials research. - Zug : Scitec Publ, Bd. 712/715.2013, S. 12-16
Influence of heat treatment and deformation on the phase-structural state of steel 30CrMnSiA
Skakov, Mazhyn; Uazyrkhanova, Gulzhaz; Popova, Natalya; Scheffler, Michael
In: Key engineering materials. - Uetikon a.S : Trans Tech Publications, Bd. 531/532.2013, S. 173-177
Way of hardening surface coating of details from steel 30CrMnSi in electrolytic plasma
Skakov, Mazhyn; Kurbanbekov, Sherzod; Scheffler, Michael
In: Key engineering materials. - Uetikon a.S : Trans Tech Publications, Bd. 531/532.2013, S. 173-177
Way of hardening surface coating of details from steel 30CrMnSi in electrolytic plasma
Skakov, Mazhyn; Zhurerova, Laila; Scheffler, Michael
In: Key engineering materials. - Uetikon a.S : Trans Tech Publications, Bd. 531/532.2013, S. 178-181
Influence of regimes electrolytic-plasma processing on phase structure and hardening of steel 30CrMnSi
Skakov, Mazhyn; Uazyrkhanova, Gulzhaz; Popova, Natalya; Scheffler, Michael
In: Management, manufacturing and materials engineering III. - Durnten-Zuerich [u.a.] : ttp, Trans Tech Publ., S. 69-73, 2013 - (Advanced materials research; 601)Kongress: ICMMM; 2 (Beijing) : 2012.09.21-23
Changes of structural-phase condition in 18CrNi3MoA-SH steel after elektrolyte-plasma processing
Skakov, Mazhyn; Bayatanova, Lyaila; Scheffler, Michael
In: Management, manufacturing and materials engineering III. - Durnten-Zuerich [u.a.] : ttp, Trans Tech Publ., S. 74-78, 2013 - (Advanced materials research; 601)Kongress: ICMMM; 2 (Beijing) : 2012.09.21-23
Modification of structure and properties of steel P6M5 at electrolyteplasma treatment
Skakov, Mazhyn; Rakhadilov, Bauyrzhan; Scheffler, Michael
In: Management, manufacturing and materials engineering III. - Durnten-Zuerich [u.a.] : ttp, Trans Tech Publ., S. 64-68, 2013 - (Advanced materials research; 601)Kongress: ICMMM; 2 (Beijing) : 2012.09.21-23
Surface hardening of 18CrNi3MoA-SH steel with heating in electrolytic plasma
Skakov, Mazhyn; Bayatanova, Lyaila; Scheffler, Michael
In: Key engineering materials. - Uetikon a.S : Trans Tech Publications, Bd. 531/532.2013, S. 242-245
Polysilazane-type polymer derived ceramic coatings on titanium metal
Smokovych, Iryna; Rannabauer, Stefan; Scheffler, Michael; Hasemann, Georg
In: Effizienz, Präzision, Qualität - 11. Magdeburger Maschinenbau-Tage ; 25. und 26. September 2013 an der OVGU - Magdeburg : Univ. - 2013, Paper B6-3, insgesamt 7 S. Kongress: Magdeburger Maschinenbau-Tage 11 Magdeburg 2013.09.25-26
Energieeffizienz durch intelligente Werkstoffpaarung - Keramische Schutzschichten in Hochtemperatur-Rekuperatoren
Federova, A.; Grunig, S.; Motz, G.; Nitsche, J.; Prette, A.; Rannabauer, S.; Werbig, H.; Wiersig, M.; Werschy, M.; Scheffler, Michael
In: Effizienz, Präzision, Qualtität. - Magdeburg : Univ., insges. 9 S., 2013Kongress: Magdeburger Maschinenbau-Tage; 11 (Magdeburg) : 2013.09.25-26
Neue verstärkte eutektische Keramik für Schneidwerkzeuge
Karpuschewski, Bernhard; Loboda, Petro; Scheffler, Michael; Emmer, Thomas; Schmidt, Konrad; Bogomol, Iurii; Chaika, Denys
In: Effizienz, Präzision, Qualtität. - Magdeburg : Univ., insges. 10 S., 2013Kongress: Magdeburger Maschinenbau-Tage; 11 (Magdeburg) : 2013.09.25-26
Changes of mechanical properties of steel 12cr18ni10ti after electrolytic-plasma cementation
Kurbanbekov, Sherzod; Skakov, Mazhyn; Scheffler, Michael; Naltaev, Azret
In: Management, manufacturing and materials engineering III. - Durnten-Zuerich [u.a.] : ttp, Trans Tech Publ., S. 59-63, 2013 - (Advanced materials research; 601)Kongress: ICMMM; 2 (Beijing) : 2012.09.21-23
Peer-reviewed journal article
Bulk ceramic composites derived from a preceramic polysilazane with alumina and zirconia fillers
Konegger, Thomas; Liersch, Antje; Gierl, Christian; Scheffler, Michael
In: Advanced engineering materials - Weinheim : Wiley-VCH Verl., Bd. 15 (2013), Heft 5, S. 394-406
Textbook
Materialwissenschaften und Werkstofftechnik - eine Einführung
Callister, William D.; Scheffler, Michael; Rethwisch, David G.
In: Weinheim: Wiley-VCH, 2013, 1. Aufl.; XXV, 881 S.: Ill., graph. Darst.; 29 cm
Materialwissenschaften und Werkstofftechnik - eine Einführung
Callister, William D.; Rethwisch, David G.; Scheffler, Michael
In: Weinheim: Wiley-VCH, 2013, XXV, 881 Seiten, ISBN: 978-3-527-33007-2 [Literaturangaben]
2012
Book chapter
Polymer derived ceramics with pores and carbon nanotubes
Mantzel, Niko; Rannabauer, Stefan; Bucharsky, Ethel C.; Hoffmann, Michael J.; Scheffler, Michael
In: Cellular materials - Dresden . - 2012, insges. 7 S. Kongress: CELLMAT 2 Dresden 2012.11.07-09
Peer-reviewed journal article
Micro- and nanospheres from preceramic polymers - process parameters and size control
Reschke, Verena; Scheffler, Michael
In: Journal of materials science. - Norwell, Mass : Springer Science + Business Media B.V, Bd. 47.2012, 15, S. 5655-5660
Original article in peer-reviewed national journal
Alumina-mullite materials for refractory applications - microstructure, physical and finite element simulation of thermal shock behaviour
Atanga, Valetine Kubong; Zhang, W.; Dreibati, O.; Doynov, N.; Wolf, M.; Ossenbrink, R.; Michailov, V.; Scheffler, Michael
In: Refractories worldforum. - Baden-Baden : Göller, Bd. 4.2012, 1, S. 159-164
2011
Book chapter
Zelluare Werkstoffe - mehr als Konstruktion und Leichtbau
Rannabauer, Stefan; Scheffler, Michael
In: 14. Sommerkurs Werkstoffe und Fügen , 2011 - Magdeburg : Universität Magdeburg, S. 17-26 Kongress: Sommerkurs Werkstoffe und Fügen 14 Magdeburg 2011.09.23-24
Biomechanische Eigenschaften von Operationsmodellen (anatomischen Faksimilemodellen) des Os temporale im Vergleich zum humanen Felsenbein
Hahne, Cornelia; Scheffler, Michael; Dietze, Gabriele; Karpuschewski, Bernhard; Döring, Joachim; Kappa, Mathias; Vorwerk, Ulrich
In: Forschung und Innovation - 10. Magdeburger Maschinenbau-Tage ; 27. - 29. September 2011 - Magdeburg: Univ., 2011, 2011, insgesamt 8 S.Kongress: Magdeburger Maschinenbau-Tage 10 (Magdeburg : 2011.09.27-29)
Keramische Werkstoffe aus Kunststoffen
Reschke, Verena; Laskowsky, Alexandra; Mikhalskiy, Aleksandr; Scheffler, Michael
In: 14. Sommerkurs Werkstoffe und Fügen. - Magdeburg : Univ., S. 89-96, 2011Kongress: Sommerkurs Werkstoffe und Fügen; 14 (Magdeburg) : 2011.09.23-24
Korund-Mullit - ein neuartiger Hochtemperatur-Kompositwerkstoff
Atanga, Valentine Kubong; Veit, Peter; Rannabauer, Stefan; Scheffler, Michael
In: 14. Sommerkurs Werkstoffe und Fügen , 2011 - Magdeburg : Universität Magdeburg, S. 83-88 Kongress: Sommerkurs Werkstoffe und Fügen 14 Magdeburg 2011.09.23-24
Dissertation
Übergangswiderstand als tribologische Kenngröße für den Schmierungszustand
Lucas, Sebastian; Deters, Ludger; Scheffler, Michael
In: Zugl.: Magdeburg, Univ., Fak. für Maschinenbau, Diss., 2011: Aachen: Shaker, II, 149 S., Ill., graph. Darst., 21 cm - (Fortschritte in der Maschinenkonstruktion; 2011,4)
Editor
Special issue: cellular materials - [the 1st International Conference on Cellular Materials - CELLMAT 2010 - was held in October 2010 in Dresden, Germany]
Stephani, Guenter; Scheffler, Michael
In: Weinheim: Wiley-VCH, 2011; S. 975 - 1071 - (Advanced engineering materials; 13.2011,11)Kongress: International Conference on Cellular Materials; 1 (Dresden) : 2010.10.CELLMAT; 1 (Dresden) : 2010.10.
Original article in peer-reviewed international journal
Novel-type inorganic foams from preceramic polymers with embedded titania nanoparticles for photo-catalytic applications
Bhattacharjee, Sarama; Ranjan Das, Pratik; Ohl, Christiane; Wilker, Viola; Kappa, Mathias; Scheffler, Franziska; Scheffler, Michael
In: Advanced engineering materials. - Weinheim : Wiley-VCH, Bd. 13.2011, 11, S. 996-1001
Editorial
Stephani, Günter; Scheffler, Michael
In: Advanced engineering materials. - Weinheim : Wiley-VCH, Bd. 13.2011, 11, S. 981
Novel open-cellular glass foams for optical Applications
Ohl, Christiane; Kappa, Mathias; Wilker, Viola; Bhattacharjee, Sarama; Scheffler, Franziska; Scheffler, Michael
In: Journal of the American Ceramic Society. - Malden [u.a.] : Blackwell Publishing, Bd. 94.2011, 2, S. 436-441
In situ carbon nanotube formation in templated pores of polymer-derived ceramics
Terry, Craig S.; Scheffler, Franziska; Torrey, Jessica D.; Bordia, Rajendra K.; Scheffler, Michael
In: Advanced engineering materials. - Weinheim : Wiley-VCH, Bd. 13.2011, 9, S. 906-912
Self-assembled microstructured polymeric and ceramic surfaces
Woiton, Michael; Heyder, Madeleine; Laskowsky, Alexandra; Stern, Edda; Scheffler, Michael; Brabec, Christoph J.
In: Journal of the European Ceramic Society. - Oxford : Elsevier, Bd. 31.2011, 9, S. 1803-1810
Original article in peer-reviewed national journal
Polymer derived ceramic foams with additional strut porosity
Reschke, Verena; Laskowsky, Alexandra; Kappa, M.; Wang, K.; Bordia, R. K.; Scheffler, Michael
In: Építőanyag. - Budapest, Bd. 63.2011, S. 57-60
Struktura ta ekspuatacijni vlastyvosti sprjamovano armovanych keramičnych instrumentalʹnych materialiv
Loboda, Petro; Karpuschewski, Bernhard; Scheffler, Michael; Chaika, Denys
In: Visnyk Nacionalʹnogo Techničnogo Universytetu Ukraïny "Kyïvsʹkyj Politechničnyj Instytut". - KyïvVisnyk Kyïvskoho Politechničnoho Instytutu / Mašinobuduvannja, Bd. 61.2011, 1, S. 171-174[Ukrainisch-deutsche Konferenz für Maschinenbau "Moderne Werkstoffe und Technologien im Maschinenbau 2011" ; 1 (Kyiv) : 2011.04.13-14]
Polymerabgeleitete Kompositkeramiken im System Si-O-C-Ta
Mikhalskiy, Aleksandr S.; Scheffler, Michael
In: Visnyk Nacionalʹnogo Techničnogo Universytetu Ukraïny "Kyïvsʹkyj Politechničnyj Instytut". - KyïvVisnyk Kyïvskoho Politechničnoho Instytutu / Mašinobuduvannja, Bd. 61.2011, 1, S. 61-65[Ukrainisch-deutsche Konferenz für Maschinenbau "Moderne Werkstoffe und Technologien im Maschinenbau 2011" ; 1 (Kyiv) : 2011.04.13-14]
Polymerabgleitende Keramiken - vielseitige Werkstoffe für Beschichtungen
Redziuk, A.; Laskowsky, Alexandra; Scheffler, Michael
In: Visnyk Nacionalʹnogo Techničnogo Universytetu Ukraïny "Kyïvsʹkyj Politechničnyj Instytut". - KyïvVisnyk Kyïvskoho Politechničnoho Instytutu / Mašinobuduvannja, Bd. 61.2011, 1, S. 56-60[Ukrainisch-deutsche Konferenz für Maschinenbau "Moderne Werkstoffe und Technologien im Maschinenbau 2011" ; 1 (Kyiv) : 2011.04.13-14]
Original article in peer-reviewed periodical-type series
Zum Problem der Erfassung und Bewertung biomechanischer Eigenschaften von Operationsmodellen (anatomischen Faksimilemodellen) bei Cochlear-Implant-Operationen
Hahne, Cornelia; Scheffler, Michael; Dietze, Gabriele; Karpuschewski, Bernhard; Döring, Joachim; Kappa, Mathias; Hessel, Horst; Vorwerk, Ulrich
In: 10. Jahrestagung der Deutschen Gesellschaft für Computer- und Roboterassistierte Chirurgie (CURAC): 15. - 16. September 2011, Magdeburg / Hrsg.: Oliver Burgert; Jörg Schipper; Stefan Zachow: 15. - 16. September 2011, Magdeburg - Magdeburg: Univ., 2011; Burgert, Oliver . - 2011, S. 139-142
2010
Original article in peer-reviewed international journal
A two-component preceramic polymer system for structured coatings on metals
Kappa,; Matthias,; Kebianyor, A.; Scheffler, Michael
In: Thin Solid Films 519 (2010) 301-305
A two-component preceramic polymer system for structured coatings on metals
Kappa, Mathias; Kebianyorb, Ayuk; Scheffler, Michael
In: Thin solid films . - Amsterdam [u.a.] Elsevier, Bd. 519.2010, 1, S. 301-305
2009
Book chapter
Highly porous components
Colombo, Paol; Scheffler, Michael
In: Polymer derived ceramics . - Lancaster, Pa. : DEStech Publications, ISBN 978-1-605-95000-6, S. 379-396, 2009
Original article in peer-reviewed international journal
Polymer derived ceramic tapes as substrate and support for zeolites
Scheffler, Franziska; Scheffler, Michael
In: Advances in applied ceramics - Abingdon: Taylor & Francis, Bd. 108 (2009), 8, S. 468-475
Non-peer-reviewed journal article
Neuartige Glasschäume mit hoher optischer Transparenz
Ohl, Christiane; Kappa, Mathias; Olschewski, Christina; Wilker, Viola; Bhattacherjee, Sarama; Scheffler, Franziska; Scheffler, Michael
In: Forum der Forschung - Cottbus: BTU . - 2009, 22, S. 133-138
2006
Article in conference proceedings
Poren als Mikroreaktoren zur in situ Herstellung von Nanoaggregaten in polymerabgeleiteten Keramiken
Scheffler, M.; Bordia, R. K.; Woltersdorf, J.; Greil, P.
In: Chemie Ingenieur Technik 8 2006, Chemie Ingenieur Technik 78 (2006) 1335-1336
Original article in peer-reviewed international journal
Zeolite coatings on porous monoliths
Scheffler, M.; Scheffler, and F.
In: Advances in Science and Technology 45 (2006) 1260-1267
Processing of ceramic foams and their surface modification with zeolites
Scheffler, M.; Scheffler, F.
In: Ceramic Forum International 85 (2008) E45-E50
2005
Article in conference proceedings
Hierarchically built porous materials from volcanic materials
Scheffler, M.; Scheffler, F.; Bordia, C. Fyfe and R.K.
In: International Conference Porous Ceramic Materials (PCM 2005) October 20-21th, 2005, Bruges, B, on CD
Original article in peer-reviewed international journal
High-yield ceramic inks for inkjet printing with Si-based preceramic polymers
Scheffler, M.; Bordia, Raj
In: Ceram. Trans. 166 (2005) 101-107
Development of a rapid crosslinking preceramic polymer system
Scheffler, M.; Bordia, R.; Travitzky, N.; Greil, P.
In: J. Europ. Ceram. Soc. 25 (2005) 175-180
2004
Original article in peer-reviewed international journal
Nickel-catalyzed in situ formation of carbon nanotubes and turbostratic carbon in polymer-derived ceramics
Scheffler, M.; Berger, A.; Pippel, E.; Woltersdorf, J.; Greil, P.
In: Mat. Chem. Phys. 84 (2004) 131-139
Polymer-derived ceramic foams with a zeolitic surface by supported crystallization
Scheffler, M.; Zeschky, J.; Zampieri, A.; Herrmann, R.; Schwieger, W.; Scheffler, F.; Greil, P.
In: Ceram. Trans. 154 (2004) 49-59
2003
Original article in peer-reviewed international journal
Poly(siloxane) derived NbC composite ceramics
Scheffler, M.; Dernovsek, O.; Schwarze, D.; Bressiani, A.H.A.; Bressiani, J.C.; Acchar, W.; Greil, P.
In: J. Mater. Sci. 38 (2003) 4925-4931
In situ formation of SiC¿Si2ON2 micro-composite materials from preceramic polymers
Scheffler, M.; Pippel, E.; Woltersdorf, J.; Greil, P.
In: Mat. Chem. Phys. 80 (2003) 565-572
2002
Article in conference proceedings
Manufacturing of thin-walled ceramic tubes from preceramic polymers
Scheffler, M.; Melcher, R.; Greil, P. Cromme and P.
In: Proc. 2nd Intl. Conf. On Shaping of Advanced Ceramics, October 24-26, 2002, Gent, B
Original article in peer-reviewed international journal
Self-Foamed Cellular Ceramics from Silicone Resins with a zeolite surface
Scheffler, M.; Gambaryan-Roisman, T.; Zeschky, J.; Greil, F. Scheffler and P.
In: Ceram. Eng. Sci. Proc. 23 [4] (2002) 203-210
2001
Article in conference proceedings
Cellular Ceramics by Self Foaming of Silicone Resins
Scheffler, M.; Zeschky, J.
In: Materials Week 2001, Biannu. Meet. Fed. Eur. Mater. Soc. (FEMS), Oktober 1-4, 2001, Munich, G, on CD
Original article in peer-reviewed international journal
decomposition of preceramic organo polysiloxanes
Scheffler, M.; Gambaryan-Roisman, T.; Takahashi, T.; Kaschta, J.; Muenstedt, H.; Buhler, P.; Greil, P.
In: Ceram. Trans. 115 (2001) 239-250
Si-C-O ceramics from preceramic polymers: Reaction mechanism between the Si-filler and the polymer derived matrix during pyrolytic conversion
Scheffler, M.; Wei, Q.; Pippel, E.; Woltersdorf, J.; Greil, P.
In: Key Eng. Mater. 206-213 (2001) 289-292
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