Effect of stoichiometry on hydrogen storage performance of Ti–Cr–VFe based alloys

In order to develop new alloys with high hydrogen storage capacity, commercially available VFe alloys were used to substitute partial Cr of TiCr 1.8. In this paper, the effects of stoichiometry on hydrogen storage performance of pseudo-binary TiCr 2 X (VFe) X ( X=0.3–0.9) alloys were investigated by...

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Bibliographic Details
Published in:Intermetallics 2005-10, Vol.13 (10), p.1075-1078
Main Authors: Taizhong, Huang, Zhu, Wu, Baojia, Xia, Naixin, Xu
Format: Article
Language:English
Subjects:
A. Laves phases
B. Hydrogen storage
B. Phase diagrams
B. Phase identification
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Summary:In order to develop new alloys with high hydrogen storage capacity, commercially available VFe alloys were used to substitute partial Cr of TiCr 1.8. In this paper, the effects of stoichiometry on hydrogen storage performance of pseudo-binary TiCr 2 X (VFe) X ( X=0.3–0.9) alloys were investigated by X-ray diffraction (XRD) and pressure composition temperature (PCT) tests. XRD tests showed that body centered cubic (BCC) phase and Ti 1.07Cr 1.93 phase coexisted in these alloys. The crystal cell parameters of BCC phase decreased linearly with increasing ratio of (Cr+VFe)/Ti. The hydrogen storage capacity of these alloys changed nonlinearly with the increase of (Cr+VFe)/Ti. The alloys with slightly substoichiometric composition were more suitable for hydrogen storage.
ISSN:0966-9795
1879-0216
DOI:10.1016/j.intermet.2004.12.024