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pro vyhledávání: '"Magnus Hamm"'
Autor:
Stefan Dietrich, Magnus Hamm, Marian David Bongers, Karl-Heinz Lang, Vladimir Roddatis, Astrid Pundt
Publikováno v:
International Journal of Hydrogen Energy. 44:32112-32123
The comprehension of solute-induced phase transformations is crucial in a variety of research fields such as catalysis, memory switching or energy storage. We study solute-induced phase transformations on the model magnesium-hydrogen (Mg–H) system
Publikováno v:
Thin Solid Films. 679:64-71
Studying size effects on the modification of thin film physical properties requires the preparation of films with desired microstructures and stress states. For the model system of epitaxial niobium thin films on sapphire [ 11 2 ¯ 0 , miscut
Publikováno v:
International Journal of Hydrogen Energy. 43:1634-1642
Hydrogen diffusion in thin magnesium films in lateral film direction is studied by stepwise electrochemical loading via the change in optical light transmission (‘electrochemical hydrogenography’) during the dihydride formation. During the first
Autor:
Magnus Hamm, Astrid Pundt
Publikováno v:
International Journal of Hydrogen Energy. 42:22530-22537
The diffusion coefficient data of hydrogen in the Magnesium-hydrogen system shows a large scatter, their trends extrapolations vary at room temperature between 10−12 m2/s and 10−29 m2/s. At room temperature the hydrogen diffusion coefficient in M
Publikováno v:
Chemphyschem : a European journal of chemical physics and physical chemistry. 20(14)
Metal-hydrogen (M-H) systems offer grand opportunities for studies on fundamental aspects of thermodynamics and kinetics. When the system size is reduced to the nanoscale, microstructural defects as well as mechanical stress affect the systems' prope
Autor:
Astrid Pundt, Björgvin Hjörvarsson, J. Kürschner, Magnus Hamm, Helmut Uchida, Reiner Kirchheim, Stefan Wagner
Publikováno v:
Acta Materialia. 85:279-289
Electrochemical hydrogen permeation measurements and in situ gas-loading X-ray diffraction measurements were performed on polycrystalline Mg films. Hydrogen diffusion constants, the hydride volume content and the in-plane stress were determined for d
Publikováno v:
International Journal of Hydrogen Energy
Thin films attached on rigid substrates can develop ultra-high compressive stresses upon hydrogen-loading. These high stresses can be released by dislocation-formation or delamination. For niobium thin films dislocation-formation was observed for fil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bed963c145e2275253a37f45baa1d9d7
https://gfzpublic.gfz-potsdam.de/pubman/item/item_4693956
https://gfzpublic.gfz-potsdam.de/pubman/item/item_4693956
Publikováno v:
Scripta Materialia. 69:756-759
Hydrogen absorption in metals causes volume expansion, which increases abruptly with phase transformation. This effect can stimulate hydrogen-induced percolation of discontinuous palladium thin films, yielding a drop in the films’ electrical resist
Publikováno v:
Nano letters. 16(10)
Hydrogen uptake in metal–hydrogen (M–H) nanosized systems (e.g., thin films, clusters) is both a fundamental and a technologically relevant topic, which is becoming more important due to the recent developments of hydrogen sensors, purification m
Publikováno v:
Applied Physics Letters. 106:243108
Nano-materials are commonly stabilized by supports to maintain their desired shape and size. When these nano-materials take up interstitial atoms, this attachment to the support induces mechanical stresses. These stresses can be high when the support