Process for producing extremely low gas and residual contents in

Details Process for producing extremely low gas and residual contents in Process for producing extremely low gas and residual contents in

1982-01-11

1984-02-21

Stallard, W.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

1481261, B22F 100

Patent

active

044328133

ABSTRACT:
A process for removing residual and tramp elements including absorbed, adsorbed or otherwise occluded gases from metal powders is disclosed. The process includes sequentially subjecting the metal powder to the melting and boiling points of the residual elements to be removed while in a vacuum atmosphere. In the case of some gases, the process includes cryogenic cooling near absolute zero temperatures.

REFERENCES:
patent: 1852583 (1932-04-01), Lucas
patent: 3697255 (1972-10-01), Baldwin et al.
patent: 4141719 (1979-02-01), Hakko

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