Isotropic permanent magnets and process for producing same

Details Isotropic permanent magnets and process for producing same Isotropic permanent magnets and process for producing same

1983-12-30

1989-06-20

Sheehan, John P.

Metal treatment

Stock

Magnetic

420 83, 420121, 75244, 75245, 75246, H01F 104

Patent

active

048406848

ABSTRACT:
Isotropic permanent magnet formed of a sintered body having a mean crystal grain size of 1-160 microns and a major phase of tetragonal system comprising, in atomic percent, 10-25% of R wherein R represents at least one of rare-earth elements including Y, 3-23% of B and the balance being Fe. As additional elements M, Al, Ti, V, Cr, Mn, Zv, Hf, Nb, Ta, Mo, Ge, Sb, Sn, Bi, Ni or W may be incorporated.
The magnets can be produced through a powder metallurgical process resulting in high magnetic properties, e.g., up to 7 MGOe or higher energy product.

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