Stein, F.; Prymak, O.; Dovbenko, O. I.; He, C.; Palm, M.; Schuster, J. C.: Investigation of Phase Diagrams of Laves Phase Containing Binary and Ternary Nb–TM(–Al) Systems with TM=Cr,Fe,Co. 2nd Sino-German Symposium on Computational Thermodynamics and Kinetics and Their Applications to Solidification, Kornelimünster, Aachen, Germany (2009)
Vogel, S. C.; Eumann, M.; Palm, M.; Stein, F.: Investigation of the crystallographic structure of the ε phase in the Fe–Al system by high-temperature neutron diffraction. TMS 2009 Annual Meeting, San Francisco, CA, USA (2009)
Stein, F.: The Binary Fe–Al System. 5th Discussion Meeting on the Development of Innovative Iron Aluminium Alloys (FEAL 2009), Prague, Czech Republic (2009)
Kumar, K. S.; Stein, F.; Palm, M.: An in-situ electron microscopy study of microstructural evolution in a Co–Co2Nb binary alloy. MRS Fall Meeting 2008, Boston, MA, USA (2008)
Vogel, S. C.; Eumann, M.; Palm, M.; Stein, F.: Investigation of the crystallographic structure of the ε phase in the Fe–Al system by high-temperature neutron diffraction. 20th Annual Rio Grande Symposium on Advanced Materials 2008, Albuquerque, NM, USA (2008)
Kumar, K. S.; Stein, F.; Palm, M.: Preliminary in-situ TEM observations of phase transformations in a Co–15 at.% Nb alloy. Workshop "The Nature of Laves Phases XI", MPIE Düsseldorf, Germany (2008)
Prymak, O.; Stein, F.: Composition dependence of site occupancy and c/a ratio in hexagonal C14 Laves phase of the Nb–Cr–Al system. TOFA Thermodynamics of Alloys 2008, Krakow, Poland (2008)
Stein, F.; Ishikawa, S.; Takeyama, M.; Kumar, K. S.; Palm, M.: Phase equilibria in the Cr–Ti system studied by diffusion couples and equilibrated two-phase alloys. Workshop "The Nature of Laves Phases XI", MPI für Eisenforschung, Düsseldorf, Germany (2008)
Oxides find broad applications as catalysts or in electronic components, however are generally brittle materials where dislocations are difficult to activate in the covalent rigid lattice. Here, the link between plasticity and fracture is critical for wide-scale application of functional oxide materials.
In this project we conduct together with Dr. Sandlöbes at RWTH Aachen and the department of Prof. Neugebauer ab initio calculations for designing new Mg – Li alloys. Ab initio calculations can accurately predict basic structural, mechanical, and functional properties using only the atomic composition as a basis.
The wide tunability of the fundamental electronic bandgap by size control is a key attribute of semiconductor nanocrystals, enabling applications spanning from biomedical imaging to optoelectronic devices. At finite temperature, exciton-phonon interactions are shown to exhibit a strong impact on this fundamental property.
Enabling a ‘hydrogen economy’ requires developing fuel cells satisfying economic constraints, reasonable operating costs and long-term stability. The fuel cell is an electrochemical device that converts chemical energy into electricity by recombining water from H2 and O2, allowing to generate environmentally-friendly power for e.g. cars or houses…
The project Hydrogen Embrittlement Protection Coating (HEPCO) addresses the critical aspects of hydrogen permeation and embrittlement by developing novel strategies for coating and characterizing hydrogen permeation barrier layers for valves and pumps used for hydrogen storage and transport applications.
In this project we study - together with the department of Prof. Neugebauer and Dr. Sandlöbes at RWTH Aachen - the underlying mechanisms that are responsible for the improved room-temperature ductility in Mg–Y alloys compared to pure Mg.
Efficient harvesting of sunlight and (photo-)electrochemical conversion into solar fuels is an emerging energy technology with enormous promise. Such emerging technologies depend critically on materials systems, in which the integration of dissimilar components and the internal interfaces that arise between them determine the functionality.
In this project, we work on a generic solution to design advanced high-entropy alloys (HEAs) with enhanced magnetic properties. By overturning the concept of stabilizing solid solutions in HEAs, we propose to render the massive solid solutions metastable and trigger spinodal decomposition. The motivation for starting from the HEA for this approach…