Method of making tungsten powder compacts

Details Method of making tungsten powder compacts Method of making tungsten powder compacts

1990-10-19

1991-06-25

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder pretreatment

419 36, 419 68, B22F 100

Patent

active

050265199

ABSTRACT:
According to a method for making a compact consisting essentially of pure tungsten metal powder, the tungsten metal powder is contacted with an aqueous acid mixture at a sufficient concentration and for a sufficient period of time to etch the surface of the powder and the resulting powder is isostaticly pressed at an ambient temperature at a pressure of from about 18,000 to about 20,000 psi. for a sufficient period of time to form a compact.

REFERENCES:
patent: 4971757 (1990-11-01), Day et al.

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