Methods of manufacturing gradient function material

Details Methods of manufacturing gradient function material Methods of manufacturing gradient function material

1994-05-19

1997-08-05

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Removal of liquid component or carrier through porous mold...

264114, 419 66, B01D 2100, B03D 300

Patent

active

056539240

ABSTRACT:
A disclosed gradient function material is produced by molding and thereafter firing a slurry which contains a plurality of groups of particles having different specific gravities. The plurality of groups of particles include at least a first group of particles and a second group of particles. The first group of particles comprises a group of nonmetal particles having a specific gravity ranging from about 3 to 7 and a maximum particle diameter equal to or smaller than a deflocculation limit, said nonmetal particles being made of one or more materials selected from the group consisting of an oxide, a carbide, a nitride, and an oxynitride. The second group of particles comprises a group of metal particles having a specific gravity which is about 1.5 times the specific gravity of said first group of particles, and particle diameters distributed across the deflocculation limit. The gradient function material is manufactured by preparing a slurry containing a plurality of groups of particles and/or a plurality of slurries, and supplying the slurry or slurries into a porous mold to form a deposited region in the porous mold initially primarily influenced by way of attraction of the porous mold and subsequently primarily influenced by a deflocculating effect of the particles in the slurry or slurries or under the influence of the gravity.

REFERENCES:
patent: 4647415 (1987-03-01), Schafft
patent: 4798694 (1989-01-01), Sugata et al.
patent: 5167813 (1992-12-01), Iwata et al.

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