| 摘要 |
PROBLEM TO BE SOLVED: To suppress compositional variations caused by the evaporation of Mg at the time of producing a hydrogen storage alloy composed of Mg, Ni and rare earth elements as the main constituting elements, to facilitate the control of the alloy composition and moreover to increase the productivity on a level of mass-production. SOLUTION: At the time of producing a hydrogen storage alloy composed of Mg, Ni and rare earth elements as the main constituting elements, a rare earth-Mg series master alloy is added to molten Ni or a molten rare earth-Ni series alloy to produce a rare earth-Mg-Ni series alloy having a desired composition. As the rare earth-Mg series master alloy, for example, an alloy containing Mg in a range of 1 to 95% by atomic ratio is used. As the molten metal for dissolving the rear earth-Mg series master alloy, for example, a molten rare earth-nickel series alloy containing rare earth elements in a range of 5 to 15% by atomic ratio is used.
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