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DS: Fachverband Dünne Schichten
DS 26: Poster II
DS 26.48: Poster
Wednesday, March 25, 2009, 09:30–12:30, P5
Formation of metal hydrides of 8b elements under plasma exposure — Marion Quaas1, Heiko Ahrens2, Oxana Ivanova2, •Harm Wulff1, and Christiane A. Helm2 — 1Ernst-Moritz-Arndt Universität Greifswald, Inst. f. Biochemie, F.-Hausdorff-Str. 4, 17487 Greifswald — 2Ernst-Moritz-Arndt Universität Greifswald, Inst. f. Physik, F.-Hausdorff-Str. 6, 17487 Greifswald
We have found a new reaction pathway to form stable 8b (Ni, Pd) metal hydride compounds under soft plasma conditions (working pressure 50 Pa, substrate temperature 450 - 550 K) The applied bias voltage was varied from 0 to -100 V.
The films were investigated by x-ray diffraction, x-ray reflectometry and atomic force microscopy.
The hydrogen incorporation takes place discontinously. To understand the phase formation we performed synchrotron investigations (Hasylab, Hamburg "Surface layers in reactive plasmas" project I-20080137).
The macroscopic kinetics of formation and decomposition processes is complex. A modified isoconversional method was used to describe the competitive reactions.