Dresden 2017 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 34: Poster session II

MM 34.22: Poster

Dienstag, 21. März 2017, 18:30–20:30, P4

Lateral H-Diffusion in Mg thin films — •Niklas Teichmann, Magnus Hamm, and Astrid Pundt — Univ. Göttingen, IMP, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

Hydrogen in metals like Magnesium changes the physical properties of the host material, such as the optical properties.[1] The optical light transmission can be used to determine locally the Hydrogen content, or to differentiate between phases (Hydrogenography).[2] For the Mg-H system, two phases are relevant at 300 K: the metallic α-phase and the transparent MgH2-phase.
In this presentation, the hydrogen-induced optical change of thin Mg-films is investigated using electrochemical loading via a Pd-gate.[3] By this, the lateral diffusion and the MgH2 formation can be directly seen and the formation kinetics can be studied. The influence of grain boundaries is discussed.
Financial support by the DFG via projects PU131/9-2 and PU131/10-2 is gratefully acknowledged.
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R. Gremaud et al. Advanced Materials 19.19 (2007): 2813-2817.
J. Kürschner et al. Journal of Alloys and Compounds 593 (2014): 87-92.

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