High purity cobalt article

Details High purity cobalt article High purity cobalt article

1985-06-20

1986-08-19

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Consolidation of powder prior to sintering

75 82, 419 38, 419 58, 419 66, B22F 100

Patent

active

046068856

ABSTRACT:
An improvement is disclosed in a process for recovery of cobalt from cobalt bearing material to obtain fine cobalt metal powder of high purity, the improvement being mechanically compacting the powder into a billet and sintering the billet in a hydrogen atmosphere at a sufficient temperature for a sufficient time to densify the billet and form a high purity cobalt article having an oxygen content of no greater than about 500 weight parts per million.

REFERENCES:
patent: 4063940 (1977-12-01), Dain et al.
patent: 4466826 (1984-08-01), Vartiainen

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