Method of compacting shaped powdered objects

Details Method of compacting shaped powdered objects Method of compacting shaped powdered objects

1972-12-22

1977-08-09

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264338, 75226, C04B 3560

Patent

active

040411230

ABSTRACT:
A method for densifying to near theoretical density a shaped body of compacted powdered particles, particularly of a refractory material, by preforming a shaped body of compacted particles of a powdered material characterized by voids, enclosing the shaped body within a loose mass of a pressure-transmitting powder disposed within a confining mold, applying a unidirectional pressure to the pressure-transmitting powder within the mold in order to compress the shaped body more compactly while heating the body to at least the densification temperature of the body, preferably in a controlled atmosphere, the temperature and/or pressure being increased incrementally up to the densification temperature of the refractory material, whereby substantially all voids within the compacted shaped body are collapsed.

REFERENCES:
patent: 2990602 (1961-07-01), Brandmayr et al.
patent: 3221365 (1965-12-01), Mattern et al.
patent: 3279917 (1966-10-01), Ballard et al.
patent: 3284195 (1966-11-01), Googin et al.
R. P. Levey, "Isostatic Hot Pressing," June 9, 1965, Contract W-7405-Eng-26 with U.S. Atomic Energy Commission, Work done at Union Carbide Corp.

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