Marx, V. M.; Kirchlechner, C.; Zizak, I.; Dehm, G.; Cordill, M. J.: In-situ fracture study of thin Cu films on polyimide substrate. GDRi MECANO General Meeting 2012, Ecole de Mines, Paris, France (2012)
Eiper, E.; Martinschitz, K. J.; Dehm, G.; Kečkéš, J.: Size effect in metallic thin films characterized by low-temperature X-ray diffraction. Gordon Research Conference on thin film & smallscale mechanical behavior , Colby College Waterville, Maine, USA (2006)
Rester, M.; Kiener, D.; Kreuzer, H. G.M.; Dehm, G.; Motz, C.: Microstructural investigation of the deformation zone below nanoindents in copper, silver and nickel. Hysitron Workshop and Usermeeting, München, Germany (2006)
Dehm, G.: Mechanische Eigenschaften in kleinen Dimensionen. Lecture: Vorlesung (3LP), SS 2015, Ruhr-Universität Bochum, Bochum, Germany, May 18, 2015 - May 22, 2015
About 90% of all mechanical service failures are caused by fatigue. Avoiding fatigue failure requires addressing the wide knowledge gap regarding the micromechanical processes governing damage under cyclic loading, which may be fundamentally different from that under static loading. This is particularly true for deformation-induced martensitic…
In this project, we employ a metastability-engineering strategy to design bulk high-entropy alloys (HEAs) with multiple compositionally equivalent high-entropy phases.
Low dimensional electronic systems, featuring charge density waves and collective excitations, are highly interesting from a fundamental point of view. These systems support novel types of interfaces, such as phase boundaries between metals and charge density waves.
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…