Method of producing elements from powders

Details Method of producing elements from powders Method of producing elements from powders

1993-12-01

1995-08-29

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Consolidation of powder prior to sintering

419 10, 419 14, 419 17, 419 19, 419 23, 419 32, 419 39, 419 58, 419 36, B22F 100, B22F 300

Patent

active

054457882

ABSTRACT:
Complex-shaped parts can be produced from powders, for example metal-matrix composites, by injection molding using a mixture of the powders with a suitable binder. The binder must be removed from the powder mixture before the final thermal treatment of the so-called green part. The present invention proposes to remove the binder by surrounding a cast part with a layer of a particulate material and to subject the cast part to isostatic pressure through the surrounding layer which can thus act as an absorbent. The surrounding layer is removed after the isostatic pressing and the part can be subjected to sintering. The method is suitable for example for aluminum-ceramic powder mixtures.

REFERENCES:
patent: 3929476 (1975-12-01), Kirby, Jr. et al.
patent: 4582682 (1986-04-01), Betz et al.
patent: 5028367 (1991-07-01), Wei et al.
patent: 5190898 (1993-03-01), Ter Maat et al.

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