Microstructure and hydrogen-absorption properties of Zr-Ni-Mn ternary alloys

Makoto Ohtsuka, Terukazu Yamauchi, Kimio Itagaki

研究成果: Article査読

1 被引用数 (Scopus)

抄録

As a fundamental study of AB2-type Laves phase alloys for use of the Ni/MH rechargeable battery, the relationship between the structure and the hydrogen-absorption properties was investigated for the annealed Zr(Ni1-xMnx)2 and ZrNinMny (n=1.0, 1.1, 1.2, 1.3 and 1.4) alloys. For the Zr(Ni1-xMnx)2 alloys, a secondary phase with a low Mn content existed along with a main C15-type Laves phase, whose volume fraction decreased with increasing Mn content. It was clarified that the hydrogen storage capacity increased with decreasing volume fraction of the secondary phase. On the other hand, the capacity of the alloys with the single C15-type Laves phase decreased with increasing Mn content. A clear relationship was found between the hydrogen-absorption properties and the lattice parameter of C15-type Laves phase, which decreased with increasing Mn content. The hydrogen storage capacity increased with increasing unit cell volume, while the desorption pressure of hydrogen decreased. It was suggested that ZrNi1.3Mn1.1 alloy was the potential alloys investigated for the rechargeable battery.

本文言語English
ページ(範囲)774-780
ページ数7
ジャーナルNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
61
8
DOI
出版ステータスPublished - 1997

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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