Hydrogen absorbing alloys having MgZn.sub.2 -type laves phase st

Details Hydrogen absorbing alloys having MgZn.sub.2 -type laves phase st Hydrogen absorbing alloys having MgZn.sub.2 -type laves phase st

1990-02-06

1992-03-17

Roy, Upendra

Alloys or metallic compositions

Zirconium or hafnium base

423644, 420900, C01B 602

Patent

active

050966650

ABSTRACT:
Alloys having the composition Zr(Mn.sub.1-x Co.sub.x).sub.y Al.sub.z A.sub.w are formed by adding rare-earth metals such as La, Ce, and Mm and the like or V to a Zr-Mn-Co-Al quaternary alloy, where A is at least one of rare-earth metals such as La, Ce, Mm and the like or V, and the amount x of Co substituent is the range 0<x<0.5; stoichiometric ratio y for (Mn+Co)/Zr, in 1.7<y<2.3; the amount z of Al added, in 0<z<0.15; and the amount w of A added, in 0<w<0.4. The alloys thus formed turn out to be hydrogen absorbing alloys having small absorption-disorption heat difference and long lives, yet maintaining the properties of the quaternary alloy.

REFERENCES:
patent: 4163666 (1979-08-01), Shaltiel et al.
patent: 4195989 (1980-04-01), Gamo et al.
patent: 4412982 (1983-11-01), Wallace et al.
patent: 4668424 (1987-05-01), Sandrock
patent: 4913879 (1990-04-01), Honda et al.
patent: 4946646 (1990-08-01), Gamo et al.

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