| 摘要 |
PROBLEM TO BE SOLVED: To produce hydrogen storage alloy excellent in activation and the quantity of hydrogen to be occluded and discharged by enabling the control of a fine structure formed by spinodal decomposition for improving the flatness of the discharge equilibrium pressure in the region of practical temp. and pressure in particular. SOLUTION: This hydrogen storage alloy is the one having a compsn. expressed by the general formula of Tix Cry Vz [where (x), (y) and (z) and denotes by atomic %, and x+y+z=100), is in the range in which body-centered cubic structural phases appear and also spinodal decomposition occurs with the exception of C14 (one kind of representative structure of Laves phases- MgZn2 type crystal structure) single phase regions, composed of a regular periodic structure formed by spinodal decomposition, and whose apparent lattice constant is regulated to 0.2950 to 0.3060nm. The producing method is composed of solution treatment at 700 to 1500 deg.C for 1min to 100hr and cooling treatment and/or aging treatment at 350 to 1200 deg.C for 1min to 200hr.
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