| 摘要 |
PURPOSE:To obtain a metallic alloy for hydrogen storage excellent in the amount of hydrogen occlusion, plateau characteristic, and plateau pressure and reduced in hysteresis, by constituting an alloy containing rare earth elements and nickel of a specific nonstoichiometric composition. CONSTITUTION:The metallic alloy for hydrogen storage containing rare earth elements and nickel has a nonstoichiometric composition represented by a formula RNi3.5-4.5M1.0-0.5 (where R means rare earth elements and M means metals other than rare earth elements and nickel). As the above R, La, Ce, Nd, Pr, Sm, etc., and mixtures thereof can be used. Moreover, Al, Mn, Fe, Co, Cr, Cu, etc., are suitably used as the above third metal M. The above alloy can be obtained by blending R, Ni, and M in the above prescribed compositional ratio, by melting the resulting mixture under the inert atmosphere of Ar, etc., by the use of an arc furnace, a high-frequency furnace, etc., at about 1,300-3,000 deg.C, by solidifying the molten metal by allowing it to stand to be cooled, and by crushing the above to about rice-grain size-100 mesh.
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