Process for producing isotropic permanent magnets and materials

Details Process for producing isotropic permanent magnets and materials Process for producing isotropic permanent magnets and materials

1991-06-18

1993-03-09

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148104, 419 12, 419 35, 419 36, 419 37, H01F 102

Patent

active

051923726

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, Zr, 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.

REFERENCES:
patent: 3901742 (1975-08-01), Facaros
patent: 4401482 (1983-08-01), Green et al.

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