von Pezold, J.; Lymperakis, L.; Neugebauer, J.: A multiscale study of the Hydrogen-enhanced local plasticity mechanism (HELP). Fruehjahrstagung der Deutschen Physikalischen Gesellschaft 2009, Dresden, Germany (2009)
Hickel, T.; Uijttewaal, M.; Neugebauer, J.: First principles determination of phase transitions in magnetic shape memory alloys. APS March Meeting, Pittsburgh, PA, USA (2009)
Marquardt, O.; Hickel, T.; Neugebauer, J.: Investigation of group III-nitride semiconductor nanostructures using an eight-band k.p formalism. APS March meeting, Pittsburgh, PA, USA (2009)
Todorova, M.; Ismer, L.; Neugebauer, J.: Role of anharmonic contributions for the elasticity of ice. March meeting of the American Physical Society (APS), Pittsburg, USA (2009)
von Pezold, J.; Lymperakis, L.; Neugebauer, J.: A multiscale study of hydrogen embrittlement in metals: Revisitting the Hydrogen-enhanced local plasticity mechanism. APS March Meeting, Pittsburgh, PA, USA (2009)
Freysoldt, C.; Neugebauer, J.; Van de Walle, C. G.: Fully ab initio supercell corrections for charged defects. APS march meeting, Pittsburgh, PA, USA (2009)
Neugebauer, J.: Materials design based on ab initio thermodynamics: Development of accurate and efficient multiscale strategies. IWOM3 – International Workshop on Multiscale Materials Modeling, Berlin, Germany (2009)
Hickel, T.; Uijttewaal, M.; Neugebauer, J.: Ab initio investigation of temperature dependent effects in magnetic shape memory Heusler alloys. SPP 1239 Convention, Duisburg, Germany (2009)
Fabritius, H.; Hild, S.; Nikolov, S.; Ziegler, A.; Raabe, D.; Friák, M.; Neugebauer, J.: Variations in the constructional morphology of crustacean skeletal elements at different hierarchical levels. Third International Conference on Mechanics of Biomaterials & Tissues ICMOBT 2009, Clearwater, FL, USA (2009)
Ma, D.; Friák, M.; Knezevic, M.; Kalidindi, S. R.; Lebensohn, R. A.; Roters, F.; Neugebauer, J.; Raabe, D.: Polycrystal coarse graining of elastic properties for Ti-Nb biomedical grades using ab-initio single crystal elastic constants. International Plasticity Conference 2009, Virgin Islands, USA (2009)
Nikolov, S.; Sachs, C.; Fabritius, H.; Raabe, D.; Petrov, M.; Friák, M.; Neugebauer, J.: Modeling of the mechanical properties of lobster cuticle from ab initio to macroscale: How nature designs multifunctional composites with optimal properties. International Plasticity Conference 2009, Virgin Islands, USA (2009)
Counts, W. A.; Friák, M.; Battaile, C.; Raabe, D.; Neugebauer, J.: Multiscale Prediction of Polycrystal Elastic Properties of Ultralight Weight Mg-Li Alloys using Ab Initio and FEM Approaches. MRS Fall Conference 2008, Boston, MA, USA (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.
This study investigates the mechanical properties of liquid-encapsulated metallic microstructures created using a localized electrodeposition method. By encapsulating liquid within the complex metal microstructures, we explore how the liquid influences compressive and vibrational characteristics, particularly under varying temperatures and strain…