Isostatic pressing with microwave heating and method for same

Details Isostatic pressing with microwave heating and method for same Isostatic pressing with microwave heating and method for same

H - Electricity

05

B

327/2.42

H05B 6/80 (2006.01) B22F 3/15 (2006.01) C04B 35/64 (2006.01) C04B 35/645 (2006.01)

Patent

CA 2009760

ABSTRACT OF THE DISCLOSURE The invention includes an isostatic press supply of heat to a workpiece by microwave energy and a method for isostatically pressing a powdered ceramic or powdered metal material that is heated by microwave energy. The isostatic press includes a pressure vessel. A fluid medium is available for supply to the pressure vessel under pressure. The invention further includes a means for transmitting microwave energy into the pressure vessel. The method includes preparing a workpiece comprising a microwave coupler material. Desirably, the workpiece is a composition comprising a powdered coupler or semiconductor and a powdered insulator. The workpiece is immersed in an additional powdered insulator which is transparent to the microwave energy. The workpiece and immersing powdered insulator are contained in a closed, compressible container. The contained, immersed workpiece is then placed into a pressure vessel. Microwave energy is transmitted into the pressure vessel at a sufficient frequency to couple with the coupler. A fluid medium is supplied into the vessel under pressure either concurrently and/or before and/or after the transmission of microwave energy. The microwave energy couples with the coupler which causes the insulator of the workpiece to heat. The immersing insulator that surrounds the workpiece remains cool.

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