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Hydrogenation of $$L$$1$$_{2}$$-type AlNi$$_{3}$$ alloy at high pressure and temperature

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

We investigated the hydrogenation of the $$L$$1$$_{2}$$-type AlNi$$_{3}$$ alloy at 3 GPa and 500$$^{circ}$$C using in situ synchrotron radiation X-ray diffraction measurements. An isotropic lattice expansion was observed to have occurred owing to the hydrogenation, and a novel hydride (AlNi$$_{3}$$H$$_{x}$$) was formed. Because of such isotropic lattice expansion, the hydrogen-occupied sites were the body-center sites of the $$L$$1$$_{2}$$ structure (P$$m$$-3$$m$$). In this case, the hydrogen content was calculated to be $$x$$ = 1.0, which is consistent with the experimental results. The AlNi$$_{3}$$H$$_{x}$$ hydride was stable under ambient conditions.

Language

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English

Journal

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Journal of Alloys and Compounds

Volume

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645

Number

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Suppl.1

Pages

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p.S61 - S63

Publication Year/Month

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2015/10

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Held date

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Location (city)

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Location (country)

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Patent information

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PDF

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Paper URL

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https://doi.org/10.1016/j.jallcom.2015.01.200

DOI for research data

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Keywords

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Hydride; High pressure and high temperature; Synchrotron radiation; AlNi3

Research Facility

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SPring-8(大型放射光施設)

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Accesses

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- Accesses

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Percentile:0.01

Category:Chemistry, Physical

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