Phase transformations of the LaNi5-H2 system

S. Ono, K. Nomura, E. Akiba, H. Uruno

研究成果: ジャーナルへの寄稿記事

69 引用 (Scopus)

抄録

Pressure-composition isotherms have been measured for the LaNi5-H2 system. The isotherms at higher than 80 °C clearly showed two plateaux on desorption, while the gap between two plateaux at the composition LaNi5H≈3 was much smaller in absorption than it was in desorption. In situ X-ray diffraction measurements have been performed at 84 °C in the pressure range up to 4.5 MPa and a new hydride phase corresponding to LaNi5H≈3 was found. The lower plateau on the isotherms is ascribed to the coexisting region of a phase (solid-solution phase) and β phase (LaNi5H≈3) and the higher plateau to that of β phase and 7 phase (LaNi5H6). Changes in lattice parameters have also been measured along these phase transformations. No distortion of the original hexagonal lattice has been observed in the present measurements. The representative lattice parameters for a, β and γ were obtained as follows. α: a = 5.01 - 5.06 A ̊, c = 4.00 A ̊; β: a = 5.27 - 5.31 A ̊, c = 4.05 - 4.10 A ̊; γ: a = 5.36 - 5.4 A ̊, c = 4.18 - 4.25 A ̊.

元の言語英語
ページ(範囲)113-117
ページ数5
ジャーナルJournal of the less-common metals
113
発行部数1
DOI
出版物ステータス出版済み - 11 1 1985

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Isotherms
Phase transitions
Lattice constants
Desorption
Chemical analysis
Hydrides
Solid solutions
X ray diffraction

All Science Journal Classification (ASJC) codes

  • Engineering(all)

これを引用

Phase transformations of the LaNi5-H2 system. / Ono, S.; Nomura, K.; Akiba, E.; Uruno, H.

:: Journal of the less-common metals, 巻 113, 番号 1, 01.11.1985, p. 113-117.

研究成果: ジャーナルへの寄稿記事

Ono, S, Nomura, K, Akiba, E & Uruno, H 1985, 'Phase transformations of the LaNi5-H2 system', Journal of the less-common metals, 巻. 113, 番号 1, pp. 113-117. https://doi.org/10.1016/0022-5088(85)90153-5
Ono, S. ; Nomura, K. ; Akiba, E. ; Uruno, H. / Phase transformations of the LaNi5-H2 system. :: Journal of the less-common metals. 1985 ; 巻 113, 番号 1. pp. 113-117.
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