Achieving coherent phase transition in palladium-hydrogen thin films

SCRIPTA MATERIALIA

卷:64

Article

Wagner, Stefan¹  Uchida, Helmut¹  Burlaka, Vladimir¹  Vlach, Martin²  Vlcek, Marian²  Lukac, Frantisek²  Cizek, Jakub²  Baehtz, Carsten³  Bell, Anthony⁴  Pundt, Astrid¹ 

[1] Univ Gottingen, Inst Mat Phys, D-3400 Gottingen, Germany

[2] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic

[3] Helmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, Dresden, Germany

[4] HASYLAB, Hamburg, Germany

关键词: Palladium;    Hydrogen;    Thin films;    Phase transformations;    Coherency;   

DOI  :  10.1016/j.scriptamat.2011.02.004

来源: Elsevier

【 摘 要 】

The thermodynamics of structural phase transformations in thin films depends on the mechanical stress that can be released by plastic deformation. For thin films below a critical film thickness, plastic deformation is energetically unfavourable: thus, the system stays coherent and stress remains. For PdHc films less than 22 nm thick, a new situation emerges: while the interfaces between matrix and hydride precipitates remain coherent throughout the complete phase transition, misfit dislocations form between the hydride phase and the substrate. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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