Method of increasing the coercive force of pulverized rare earth

Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials

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148 3157, 148103, 148108, 427130, 428403, 428900, H01F 102

Patent

active

040639711

ABSTRACT:
The coercive force of pulverized selected rare earth-cobalt alloys is increased or maintained at least at its initial value by depositing tin on the surface of the alloy particles and subjecting the particles to a heat treatment so as to cause diffusion of the tin into the particle structure.
Permanent magnets formed from tin enriched rare earth-cobalt alloy particles are also disclosed.

REFERENCES:
patent: 2974104 (1961-03-01), Paine et al.
patent: 3523836 (1970-08-01), Buschow et al.
patent: 3591428 (1971-07-01), Buschow et al.
patent: 3615914 (1971-10-01), Becker

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