Stein, F.; Vogel, S. C.; Eumann, M.; Palm, M.: Determination of the crystal structure of the ε phase in the Fe–Al system by high-temperature neutron diffraction. Intermetallics 18 (1), pp. 150 - 156 (2010)
Krein, R.; Palm, M.; Heilmaier, M.: Characterization of microstructures, mechanical properties, and oxidation behavior of coherent A2 + L21 Fe–Al–Ti. Journal of Materials Research 24 (11), pp. 3412 - 3421 (2009)
Palm, M.: Phase equilibria in the Fe corner of the Fe–Al–Nb system between 800 and 1150°C. Journal of Alloys and Compounds 475 (1-2), pp. 173 - 177 (2009)
Palm, M.: Fe–Al materials for structural applications at high temperatures: Current research at MPIE. International Journal of Materials Research 100 (3), pp. 277 - 287 (2009)
Eumann, M.; Sauthoff, G.; Palm, M.: Phase equilibria in the Fe–Al–Mo system - Part II: Isothermal sections at 1000 and 1150 °C. Intermetallics 16 (6), pp. 834 - 846 (2008)
Krein, R.; Palm, M.: The influence of Cr and B additions on the mechanical properties and oxidation behaviour of L21-ordered Fe-Al-Ti-based alloys at high temperatures. Acta Materialia 56 (10), pp. 2400 - 2405 (2008)
Eumann, M.; Sauthoff, G.; Palm, M.: Phase equilibria in the Fe–Al–Mo system - Part I: Stability of the Laves phase Fe2Mo and isothermal section at 800 °C. Intermetallics 16 (5), pp. 706 - 716 (2008)
Stein, F.; Palm, M.: Re-determination of transition temperatures in the Fe–Al system by differential thermal analysis. International Journal of Materials Research 98 (7), pp. 580 - 588 (2007)
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 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.
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.
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…