Method for producing anisotropic RE-FE-B type magnetically align

Details Method for producing anisotropic RE-FE-B type magnetically align Method for producing anisotropic RE-FE-B type magnetically align

1988-08-05

1989-11-21

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148105, 75 05R, H01F 102

Patent

active

048819859

ABSTRACT:
A method to produce rare earth (RE), iron, boron type anisotropic permanently magnetic material includes forming magnetically isotropic coarse powder particles of melt-spun alloy with a very fine grain RE.sub.2 FE.sub.14 B phase. The particles are mixed with inert particles of a size and of a weight percentage of the mixture to separate the powder particles for preventing hot work bonding therebetween. The mixture is hot pressed to cause the magnetically isotropic particles to be compressed in a direction parallel to the press direction so as to strain the particles to cause crystallites to be oriented along a crystallographically preferred magnetic axis resulting in particles of anisotropic permanently magnetic material.

REFERENCES:
patent: 4496395 (1985-01-01), Croat
patent: 4710239 (1987-12-01), Lee et al.

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