Pressure assisted sinter process

Details Pressure assisted sinter process Pressure assisted sinter process

1985-08-29

1986-05-27

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Consolidation of powder prior to sintering

419 23, 419 42, 419 53, 419 54, 419 60, 419 48, 419 49, 148 37, 148135, 1481261, 148133, B22F 100

Patent

active

045914826

ABSTRACT:
Pressure assisted sintering achieves full densification in short sinter times with low grain growth. This result is enabled by a stage of sintering to a condition of closed porosity (14) followed by a pressure assisted sinter (PAS) stage (16) carried out at a temperature close to, but just below, sinter temperature. Advantageously a small melt formation is induced by a brief temperature spiking (18) during the PAS stage to enable collapse of voids.

REFERENCES:
patent: 4331477 (1982-05-01), Kubo et al.
patent: 4478790 (1984-10-01), Huther et al.

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