Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Consolidation of powder prior to sintering
Patent
1995-07-31
1997-10-14
Jordan, Charles T.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Consolidation of powder prior to sintering
419 42, 419 48, B22F 312
Patent
active
056781660
ABSTRACT:
The present invention pertains to an apparatus to hot triaxially compact powder. The apparatus includes a device for hydrostatically stressing the powder. The apparatus also includes a device for applying a shear stress to the powder simultaneously with the hydrostatic stress. Additionally, there is a device for heating the powder while the powder is hydrostatically in shear stress. The presence of the shear stress during the compaction of the powder has three primary effects. It can increase the final density and the densification rate of the compacted powder. It can cause microstructural changes in the compacted powder, and it can disrupt heterogeneities.
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Piehler Henry R.
Watkins Daniel M.
Jenkins Daniel
Jordan Charles T.
Piehler Henry R.
Schwartz Ansel M.
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