Magnetic materials and permanent magnets

Details Magnetic materials and permanent magnets Magnetic materials and permanent magnets

1988-07-26

1992-03-17

Yee, Deborah

Metal treatment

Stock

Magnetic

420121, 420 83, C22C 3800

Patent

active

050965123

ABSTRACT:
Magnetic materials comprising Fe, B and R (rare earth elements) having a major phase of an Fe-B-R intermetallic compound which may be a tetragonal system, wherein at least 50 at % of R consists of Nd and/or Pr, and anisotropic sintered permanent magnets consisting essentially of 8-30 at % R, 2028 at %, B and the balance being Fe with impurities. These magnetic materials and permanent magnets may contain additional elements M (Ti, Ni, Bi, V, Nb, Ta, Cr, Mo, W, Mn, Al, Sb, Ge, Sn, Zr, Hf), thus providing Fe-B-R-M type materials and magnets.

REFERENCES:
patent: 4601875 (1986-07-01), Yamamoto et al.
patent: 4663066 (1987-05-01), Fruchart et al.
patent: 4684406 (1987-08-01), Matsuura et al.
patent: 4721538 (1988-01-01), Narasimhan et al.
patent: 4765848 (1988-08-01), Mohri et al.
patent: 4770702 (1988-09-01), Ishigaki et al.
patent: 4770723 (1988-09-01), Sagawa et al.
patent: 4773450 (1988-09-01), Fujimura et al.
patent: 4840684 (1989-06-01), Fujimura et al.

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