Magnetic precursor materials for making permanent magnets

Details Magnetic precursor materials for making permanent magnets Magnetic precursor materials for making permanent magnets

1994-02-10

1995-11-14

Yee, Deborah

Metal treatment

Stock

Magnetic

420121, 420 83, C22C 3810

Patent

active

054663083

ABSTRACT:
Magnetic materials comprising Fe, B, R (rare earth elements) and Co having a major phase of Fe-Co-B-R intermetallic compound(s) of tetragonal systems and sintered anisotropic permanent magnets consisting essentially of, by atomic percent, 8-30% R (at least one of rare earth elements inclusive of Y), 2-28% B, no less than 50% Co, and the balance being Fe with impurities. Those may contain additional elements M (Ti, Ni, Bi, V, Nb, Ta, Cr, Mo, W, Mn, Al, Sb, Ge, Sn, Zr, Hf) providing Fe-Co-B-R-M type materials and magnets.

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patent: 4792368 (1988-12-01), Sagawa et al.
patent: 4840684 (1989-06-01), Fujimura et al.
Kuzma, Yu B., "The Interaction of Transition of Rare Earth Metals with Boron", Journal of the Less Common Metals, 67 (1979), pp. 51-57.

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