Method of forming porous bodies of molybdenum or tungsten

Details Method of forming porous bodies of molybdenum or tungsten Method of forming porous bodies of molybdenum or tungsten

Filed on

1991-10-17

Date issued

1993-05-25

Examiner

Bell, Mark L.

Patent Class

Specialized metallurgical processes, compositions for use therei

SubClass

Processes

SubSubClass

Producing or treating free metal

Other Related Categories

75623, 264 65, 428613, B32B 518

Type

Patent

Status

active

Patent number

052136124

Description

ABSTRACT:
A method for forming a porous body of a metal from the group consisting of molybdenum, molybdenum alloy, tungsten, tungsten alloy, or mixtures thereof comprises foaming a mixture of a sinterable powder of the metal and a foaming agent in a volume ratio of about 0.6 to 3.5:1 respectively, to form a foam having the metal powder dispersed therein. The foam is heated in a reducing atmosphere that promotes interparticle diffusion and bonding, to decompose the foam and sinter the metal powder to form the porous body.

REFERENCES:
patent: 3833386 (1974-09-01), Wood et al.
patent: 4981820 (1991-01-01), Renlund et al.

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