Process for the production of cobalt-rare earth alloy powders

Details Process for the production of cobalt-rare earth alloy powders Process for the production of cobalt-rare earth alloy powders

1980-09-30

1981-09-22

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

75 05BA, 75 05BC, 148105, 148126, 252 6255, H01F 102

Patent

active

042908264

ABSTRACT:
A process for producing cobalt-rare earth alloy powders suitable for forming into permanent magnets includes mixing cobalt powder particles having refractory oxide dispersoid powder particles fixed in the surfaces of the cobalt particles with particles of a rare earth element in a proportion corresponding to the composition of the alloy to be formed. The mixture is heated to cause the cobalt-dispersoid particles and the rare earth particles to form the desired alloy by diffusion with substantially no sintering.

REFERENCES:
patent: 3540945 (1970-11-01), Strnat
patent: 3625779 (1971-12-01), Cech
patent: 3690963 (1972-09-01), Spink
patent: 3741748 (1973-06-01), Fustukian et al.
patent: 3826696 (1974-07-01), Cech
patent: 3928089 (1975-12-01), Cech
patent: 4010025 (1977-03-01), Fraioli et al.
"Sintering of Die-Pressed Co.sub.5 Sm Magnets", Journal of Applied Physics, vol. 41, No. 13, Dec. 1970, pp. 5247-5249, Cech.

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