Process for shaping any desired component using a powder as the

Details Process for shaping any desired component using a powder as the Process for shaping any desired component using a powder as the

1991-03-12

1991-12-31

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Post sintering operation

419 60, 419 49, 264 65, 264125, C21D 100

Patent

active

050770020

ABSTRACT:
Process for shaping any desired metallic and/or ceramic component, in which a dry powder is filled loosely into a ceramic mold, which elastically/plastically yields or cracks and breaks under the influence of shrinkage stresses during sintering, and is sintered. Variants for the mold: thin, resilient shells made of Al.sub.2 O.sub.3, SiO.sub.2 or MgO; special glass which cracks in a network-like manner; a mold having predetermined breaking points, ceramic shell disintegrating into fragments; flexible green ceramic sheeting; green ceramic composition with shrinkage during sintering.

REFERENCES:
patent: Re31355 (1983-08-01), Rozmus
patent: 1788101 (1931-01-01), Gates
patent: 3622313 (1971-11-01), Havel
patent: 3939241 (1976-02-01), Powell et al.
patent: 4164527 (1979-08-01), Bakul et al.
patent: 4199339 (1980-04-01), Grunke
patent: 4673549 (1987-06-01), Ecer
patent: 4722825 (1988-02-01), Goldstein
patent: 4724123 (1988-02-01), Rozmus, Jr.
patent: 4943320 (1990-07-01), Pechnik et al.

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