Permanent magnet

Details Permanent magnet Permanent magnet

1986-09-10

1989-08-22

Sheehan, John P.

Metal treatment

Stock

Magnetic

420 83, 420121, 75244, H01F 104

Patent

active

048592544

ABSTRACT:
A permanent magnet according to the present invention is characterized in that it is composed of an alloy comprising mainly of iron, and R (rare earth element including yttrium), cobalt, and boron, wherein the alloy is formed principally of ferromagnetic Fe-rich phase of tetragonal system and includes a nonmagnetic Laves phase. Compared with the prior rare earth-Fe based magnet, it has higher Curie temperature and has excellent magnetic characteristics, especially the temperature characteristics.

REFERENCES:
patent: 4402770 (1983-09-01), Koon
patent: 4533408 (1985-08-01), Koon
patent: 4541877 (1985-09-01), Stadelmaier et al.
IEEE Transactions on Magnetics, vol. MAG-21, No. 5, Sep. 1985, pp. 1955-1957.

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