Lange, B.; Freysoldt, C.; Neugebauer, J.: Highly p-doped GaN:Mg! What hinders the thermal drive-out of hydrogen? 2. Klausurtagung des Graduierten Kollegs: Mikro und Nanostrukturen in der Optoelektronik, Bad Karlshafen, Germany (2009)
Elstnerová, P.; Friák, M.; Neugebauer, J.: Crustacean skeletal elements: Variations in the constructional morphology at different hierarchical levels. Seminar talk at Masaryk University, Brno, Czech Republic (2009)
Hickel, T.; Al-Zubi, A.; Neugebauer, J.: Ab initio investigation of temperature dependent effects in magnetic shape memory Heusler alloys. SPP1239 Fokustreffen A "Fundamentals", Bonn, Germany (2009)
Counts, W. A.; Friak, M.; Raabe, D.; Neugebauer, J.: Ab Initio Determined Materials-Design Limits in Ultra Light-Weight Mg-Li Alloys. 8th International Conference on Magnesium Alloys and their Applications, Weimar, Germany (2009)
Lymperakis, L.; Neugebauer, J.: Adatom Kinetics, Thermodynamics, and Si Incorporation on Non-Polar III-Nitride Surfaces: Implications on Nanowire Growth. 8th nternational Conference on Nitride Semiconductors, Jeju Island, South Korea (2009)
Todorova, M.; Neugebauer, J.: Extending the Concept of Semiconductor Defect Chemistry to Electro Chemistry: A Novel Approach to Construct ab Initio Electrochemical E/pH Diagrams. 216th ECS Meeting, Vienna, Austria (2009)
Hickel, T.; Körmann, F.; Dick, A.; Neugebauer, J.: Considerations on the magnetic contribution to the free energy of Fe and related alloys. MCA-Fe. International workshop "Modern computational approaches in iron based alloys”, Ekaterinburg, Russia (2009)
Neugebauer, J.: Computing the free energy: Possibilities, challenges and limitations of present day ab initio techniques. Workshop: “Modern computational approaches in iron based alloys”, Ekaterinburg, Russia (2009)
Dick, A.; Hickel, T.; Neugebauer, J.: Thermodynamics of high-Mn steels from ab initio theory. Workshop of the SFB761 "Steel - ab initio", Salzgitter, Germany (2009)
Hickel, T.; Uijttewaal, M.; Neugebauer, J.: First principles determination of phase transitions in magnetic shape memory alloys. 1st International Conference on Material Modeling, Dortmund, Germany (2009)
Ma, D.; Friák, M.; Raabe, D.; Neugebauer, J.: Multi-physical alloy approaches to solid solution strengthening of Al. 1st International Conference on Material Modelling, Dortmund, Germany (2009)
Hickel, T.; Neugebauer, J.: First principles determination of phase transitions in magnetic shape memory alloys. Esomat 2009. The 8th European Symposium on Martensitic Transformations, Prague, Czech Republic (2009)
Hickel, T.; Uijttewaal, M.; Neugebauer, J.: First principles determination of phase transitions in magnetic shape memory alloys. Euromat 2009, Glasgow, UK (2009)
Hydrogen in aluminium can cause embrittlement and critical failure. However, the behaviour of hydrogen in aluminium was not yet understood. Scientists at the Max-Planck-Institut für Eisenforschung were able to locate hydrogen inside aluminium’s microstructure and designed strategies to trap the hydrogen atoms inside the microstructure. This can…
With the support of DFG, in this project the interaction of H with mechanical, chemical and electrochemical properties in ferritic Fe-based alloys is investigated by the means of in-situ nanoindentation, which can characterize the mechanical behavior of independent features within a material upon the simultaneous charge of H.
This project will aim at addressing the specific knowledge gap of experimental data on the mechanical behavior of microscale samples at ultra-short-time scales by the development of testing platforms capable of conducting quantitative micromechanical testing under extreme strain rates upto 10000/s and beyond.
The aim of the current study is to investigate electrochemical corrosion mechanisms by examining the metal-liquid nanointerfaces. To achieve this, corrosive fluids will be strategically trapped within metal structures using novel additive micro fabrication techniques. Subsequently, the nanointerfaces will be analyzed using cryo-atom probe…
Hydrogen embrittlement (HE) of steel is a great challenge in engineering applications. However, the HE mechanisms are not fully understood. Conventional studies of HE are mostly based on post mortem observations of the microstructure evolution and those results can be misleading due to intermediate H diffusion. Therefore, experiments with a…
The goal of this project is the investigation of interplay between the atomic-scale chemistry and the strain rate in affecting the deformation response of Zr-based BMGs. Of special interest are the shear transformation zone nucleation in the elastic regime and the shear band propagation in the plastic regime of BMGs.
“Smaller is stronger” is well known in micromechanics, but the properties far from the quasi-static regime and the nominal temperatures remain unexplored. This research will bridge this gap on how materials behave under the extreme conditions of strain rate and temperature, to enhance fundamental understanding of their deformation mechanisms. The…