| 摘要 |
PROBLEM TO BE SOLVED: To produce a hydrogen storage alloy having high hydrogen occluding capacity and a long term repeated hydrogen absorbing and releasing service life (being hard to be pulverized) suitable for storing and transporting hydrogen or the like, usable at a temp. in the vicinity of a room temp., excellent in oxidation-resistance and easily treatable in the air and to provide a method for producing the same. SOLUTION: A hydrogen storage allay having a compsn. expressed by Tia V1-a-b-c-d Crb Ac Bd (A denotes one or more kinds among Mn, Fe, Co, Cu, Nb, Zn, Zr, Mo, Ag, Hf, Ta, W, Al, Si, C, N, P and B, B denotes one or more kinds among Ln (lanthanoid seres metals) and Y, a=0.2 to 0.5, b=0.1 to 0.4, c=0.01 to 0.2 and d:0.001 to 0.03) and in which the average grain size of the main phases is regulated to <=40μm is produced by a rapid solidifying method.] The surface of this hydrogen storage alloy is applied with Ni coating, then, heat treatment is executed at 400 to 1,000 deg.C, or the surface of the hydrogen storage alloy is applied with Ni coating by a mechanical alloying method to form an Ni-added layer essentially consisting of a Ti-Ni compd., by which its oxidation resistance remarkably improves.
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