Cobalt rich manganese containing near-zero magnetostrictive meta

Details Cobalt rich manganese containing near-zero magnetostrictive meta Cobalt rich manganese containing near-zero magnetostrictive meta

1982-03-04

1984-03-27

Sheehan, John P.

Metal treatment

Stock

Amorphous, i.e., glassy

148420, 420435, 420436, C22C 1900

Patent

active

044392532

ABSTRACT:
A cobalt based, manganese-containing glassy metal alloy is provided. The alloy has a combination of near-zero magnetostriction (+5 ppm to -1 ppm), high permeability (greater than 5,000) and high saturation induction (about 1.09 T or greater). The alloy has a composition described by the formula [Co.sub.a Fe.sub.1-a ].sub.100-(b+c) Mn.sub.b B.sub.c-d Si.sub.d, where "a" ranges from about 0.90 to 0.99, "b" ranges from about 2 to 6 atom percent, "c" ranges from about 14 to 20 atom percent and "d" ranges from zero to about 7 atom percent, with the proviso that the minimum B present is 10 atom percent. The alloys of the invention find use in magnetic recording heads, switching power supplies, special magnetic amplifiers and the like.

REFERENCES:
patent: 3856513 (1974-12-01), Chen
patent: 4038073 (1977-07-01), O'Handley et al.
patent: 4056411 (1977-11-01), Chen et al.
patent: 4067732 (1978-01-01), Ray
patent: 4116682 (1978-09-01), Polk et al.
patent: 4221592 (1980-09-01), Ray

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