Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making composite or hollow article
Patent
1989-05-11
1990-04-10
Hunt, Brooks H.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making composite or hollow article
419 49, 75249, B22F 300
Patent
active
049156055
ABSTRACT:
A method of consolidating metal powders selected from the group consisting essentially of aluminum, aluminum alloys, and aluminum metal matrix composites includes: pressing the powder into a preform, and preheating the preform to elevated temperatures; providing a bed of flowable pressure transmitting particles; positioning the preform in such relation to the bed that the particles encompass the preform; and pressurizing the bed to compress the particles and cause pressure transmission via the particles to the preform, thereby to consolidate the body into desired shape. Typically, the metal powder has surface oxide, and such pressurizing is carried out to break up, partially or fully, the surface oxide.
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Anderson Raymond L.
Chan Hing
Oslin Brian L.
Ceracon, Inc.
Haefliger William W.
Hunt Brooks H.
Mai Ngoclan
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