MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
A Novel Thermic Process for Producing V-Based Solid Solution Type Hydrogen Storage Alloy
Akio KawabataHideo YoshinagaMakoto TsukaharaTetsuo SakaiSeiji SakuraiYoshihisa KamiyaKunio TakahashiHiroyuki TakeshitaNobuhiro KuriyamaJun Shi
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2001 Volume 42 Issue 8 Pages 1794-1799

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Abstract

The performance of a high hydrogen capacity alloy, V–16%Ti–12%Ni–1.4%Nb–0.96%Co–2.8%Ta, is sensitively influenced by dissolved aluminum and oxygen, both of which can be removed from vanadium by a refining process, but the process currently used is too expensive. It is necessary to develop a process to remove these impurities at a reasonable cost. We propose a new method for production of the alloy. A V–15%Ni–1.8%Nb precursor with a low enough level of aluminum was produced by alumino-thermic reduction from a mixture of V2O5, Nb2O5 and nickel. Subsequently, a V–16%Ti–12%Ni–1.4%Nb–0.96%Co–2.8%Ta alloy was obtained by alloying the precursor and the other constituents of titanium, cobalt and tantalum, and by adding mischmetal as a reducing agent to remove oxygen to a low enough level. It was demonstrated that, by the method described here, the vanadium-based alloy could be produced at a reasonable cost.

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© 2001 The Japan Institute of Metals and Materials
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