Formation of BCC TiFe hydride under high hydrogen pressure

Endo, Naruki; Saito, Hiroyuki; Machida, Akihiko; Katayama, Yoshinori

We investigated the hydrogenation of a binary TiFe alloy at 5 GPa and 600 $^{circ}$ C by in situ synchrotron radiation X-ray diffraction measurements. After formation of a solid solution of hydrogen in TiFe, an order-disorder phase transition in the metal lattice of TiFe occurred, which yielded a BCC TiFe hydride. The unit cell volume of the BCC hydride increased by 21.0% after the hydrogenation reaction. The volume expansition was larger than that of a -hydride TiFeH $_{1.9}$ prepared by hydrogenation near ambient conditions.

Language	:	English
Journal	:	International Journal of Hydrogen Energy
Volume	:	38
Number	:	16
Pages	:	p.6726 - 6729
Publication Year/Month	:	2013/05
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Paper URL	:	https://doi.org/10.1016/j.ijhydene.2013.03.120
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Registration No. : AA20130061
JAEA Abstracts No. : 41000772
Paper Submission No. : 12616

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