Formation of a tetragonal phase hydride in Ti-Mo-H system

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	Formation of a tetragonal phase hydride in Ti-Mo-H system
	E. D. Wu ; X. Xu ; X. Z. Yuan ; X. M. Guo ; S. C. Wang
刊名	Journal of Alloys and Compounds
	2008
卷号	458 期号:1-2 页码:161-165
关键词	hydrogen storage materials gas-solid reactions X-ray diffraction titanium hydride zirconium alloy diffraction deuteride crystallography transformation property neutron
ISSN号	0925-8388
中文摘要	The structural relationship between the hydride phases in Ti-Mo-H solid solution system (Mo content up to 15 at% in the alloy) during dehydrogenation process under annealing has been studied by conventional and in situ X-ray powder diffraction and transmission electron microscopy (TEM) analysis. During dehydrogenation, the saturated hydrides of the Ti-Mo alloys with fcc delta-phase structure transfer into bcc beta-phase at higher temperatures. An associated hydrogen concentration reduction for the delta-phase hydride is observed in the process. However, as the hydrogen concentrations decrease to certain values (H/M similar to 1.1-1.7), the unsaturated delta-phase formed at high temperature would become unstable at lower temperature, and transfer into a tetragonal phase (denoted the epsilon-phase here). Unlike that of the e-phase in Ti-H system, the phase transition does not occur for the saturated delta-phase with hydrogen concentration close to the stoichiometric limit. The hydrogen concentration of this epsilon-phase hydride is in between that of the tetragonal gamma and epsilon-phase in Ti-H system, but more close to the gamma-phase. The occurrence region of this epsilon-phase expands along with the increase of the Mo content in the alloys. The phase has a lattice similar to that of the e-phase in Ti-H system with corresponding fct unit-cell c/a < 1. (c) 2007 Published by Elsevier B.V.
原文出处	://WOS:000256641200030
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/33199]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	E. D. Wu,X. Xu,X. Z. Yuan,et al. Formation of a tetragonal phase hydride in Ti-Mo-H system[J]. Journal of Alloys and Compounds,2008,458(1-2):161-165.
APA	E. D. Wu,X. Xu,X. Z. Yuan,X. M. Guo,&S. C. Wang.(2008).Formation of a tetragonal phase hydride in Ti-Mo-H system.Journal of Alloys and Compounds,458(1-2),161-165.
MLA	E. D. Wu,et al."Formation of a tetragonal phase hydride in Ti-Mo-H system".Journal of Alloys and Compounds 458.1-2(2008):161-165.