Metal treatment – Stock – Magnetic
Patent
1995-06-07
1997-07-08
Yee, Deborah
Metal treatment
Stock
Magnetic
420121, 420 83, C22C 3800, C22C 1907, C22C 3810
Patent
active
056456514
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.
REFERENCES:
patent: 4601875 (1986-07-01), Yamamoto et al.
patent: 4684406 (1987-08-01), Matsuura et al.
patent: 4767474 (1988-08-01), Fujimura et al.
patent: 4770723 (1988-09-01), Sagawa et al.
patent: 4773950 (1988-09-01), Fujimura et al.
patent: 4792368 (1988-12-01), Sagawa et al.
patent: 4840684 (1989-06-01), Fujimura et al.
Fujimura Setsuo
Matsuura Yutaka
Sagawa Masato
Sumitomo Special Metals Co. Ltd.
Yee Deborah
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