Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Heat and pressure simultaneously to effect sintering
Patent
1994-04-05
1995-06-27
Walsh, Donald P.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Heat and pressure simultaneously to effect sintering
419 49, B22F 314
Patent
active
054277361
ABSTRACT:
A method for making metal alloy foils directly from metal alloy powder is described. The metal alloy foils are formed by the use of a combination of a means for heating and a means for pressing, such as a hot isostatic press, to densify a metal alloy powder so as to directly form a metal alloy foil. The metal alloy powder is contained within an apparatus which has a near-net shape of a foil, such that the application of heat and pressure will consolidate the metal powder and form the metal alloy foil. This method may be used to make metal foils out of a wide variety of metal alloys, particularly high temperature alloys, such as Ti-base, Ni-base, and B-base and Al-Si alloys. After the step with heating and pressing, the metal alloy foil is removed from the apparatus which is used to contain it, such as by the use of chemical etching or milling. The method also comprises subsequent thermal or mechanical processing of the metal alloy foil in order to improve its properties, such as the use of cold-rolling to enhance the uniformity of the metal alloy foil thickness and/or alter the mechanical properties of the foil.
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Dupree Paul L.
Ritter Ann M.
Wemple, Jr. Donald N.
Anderson Edmund P.
General Electric Company
Jenkins Daniel
Magee Jr. James
Walsh Donald P.
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