Method of manufacturing a permanent magnet

Details Method of manufacturing a permanent magnet Method of manufacturing a permanent magnet

1989-10-16

1991-02-26

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

419 23, 419 33, 419 38, 75246, 252 6255, B22F 100

Patent

active

049960237

ABSTRACT:
The invention describes a method of manufacturing a magnet on the basis of Re.sub.2 Fe.sub.14 B. To this end, a shaped body of the said composition is sintered by means of induction heating to a density exceeding 95% of the theoretical maximum density. The method according to the invention enables the manufacture of magnets having excellent properties in a very short time, these properties being: a high energy product, a large remanence, a high density, a large intrinsic coercive force and a small particle size.

REFERENCES:
patent: 4765848 (1988-09-01), Mohri et al.
patent: 4814139 (1989-03-01), Tokunaga et al.
patent: 4826546 (1989-05-01), Yamamoto et al.
patent: 4836868 (1989-06-01), Yajima et al.
patent: 4859410 (1989-08-01), Brewer
patent: 4867809 (1989-09-01), Haverstick
patent: 4881985 (1989-11-01), Brewer
patent: 4898625 (1990-02-01), Otsuka et al.

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