Alloys or metallic compositions – Alkaline earth metal base
Patent
1988-05-16
1990-08-07
Roy, Upendra
Alloys or metallic compositions
Alkaline earth metal base
296231, 29 40, 420580, 420588, 420900, 423644, 429209, C22C 2200, C01F 300
Patent
active
049466461
ABSTRACT:
A hydrogen storage electrode comprising a body of an alloy of the general formula, AB.sub.a, or a hydride thereof, in which A represents at least one element selected from the group consisting of Zr, Ti, Hf, Ta, Y, Ca, Mg, La, Ce, Pr, Mm, Nb, Nd, Mo, Al and Si, B represents at least one element selected from Ni, V, Cr, Mn, Fe, Co, Cu, Zn, Al, Si, Nb, Mo, W, Mg, Ca, Y, Ta, Pd, Ag, Au, Cd, In, Sn, Bi, La, Ce, Mm where Mm is a mixture of rare earth elements, Pr, Nd, Th and Sm provided that A and B are different from each other, and a is a value of from 1.0 to 2.5. The alloy has an alloy phase which is substantially a Laves phase of an intermetallic compound of A and B, and has a crystal structure of a hexegonally symmetric C14 type having crystal lattice constants, a and c, of from 4.8 to 5.2 angstroms and from 7.9 to 8.3 angstroms, respectively, and/or a cubically symmetric C15 type having a crystal lattice constant of from 6.92 to 7.70 angstroms. A method for making the electrode is also described using a sintering or non-sintering process.
REFERENCES:
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Journal of the Less-Common Metals, vol. 131, 15th Mar. 1987, pp. 311-319, Elsevier Sequoia, NL; S. Wakao et al.: "Capacities and Durabilities of Ti-Zr-Ni Alloy Hydride Electrodes and Effects of Electroless Plating on their Performance".
Gamo Takaharu
Iwaki Tsutomu
Moriwaki Yoshio
Matsushita Electric - Industrial Co., Ltd.
Roy Upendra
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