H2 Absorbing-desorbing characterization of the TiVFe alloy system

Kei Nomura, Etsuo Akiba

研究成果: ジャーナルへの寄稿学術誌査読

83 被引用数 (Scopus)


Twenty six kinds of alloys with compositions Ti(33-47 mol%)-V(42-67 mol%)-Fe(0-14 mol%) were tested to find the most suitable composition for hydrogen absorbtion (including tritium recovery and storage). The best alloy composition was found to be Ti43.5V49.0Fe7.5, and this alloy was able to absorb hydrogen up to 3.90 wt% ( H M = 1.90) at 253 K. The hydrogen capacity was estimated to be 2.4 wt% when hydrogen was absorbed at 253 K and desorbed at 573 K at 1 atm hydrogen pressure. The hydrogen absorption rate at 253 K was faster than that of the LaNi5H2 system at 293 K. Conspicuous changes in pressure-composition (p-c) isotherms were not found after 50 cycles of hydrogen absorption and desorption. All dehydrided alloys are bcc, dihydrides of the alloy are fcc. Among the series of TiVX alloys (X = Fe, Co, Ni, Cr and Pd), iron was found to be the best substituent element for X. Two kinds of industrial ferrovanadium alloys containing about 4 wt% of impurities (Al, Si, etc.) were tested to prepare the alloys. Remarkable differences in the p-c isotherms were observed which may be due to the effect of impurities in the ferrovanadium.

ジャーナルJournal of Alloys and Compounds
出版ステータス出版済み - 12月 15 1995

!!!All Science Journal Classification (ASJC) codes

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学


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