Isostatic pressing with microwave heating and method for same

Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Powder shape or size characteristics

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

419 30, 419 42, 419 49, 419 52, B22F 100

Patent

active

049386735

ABSTRACT:
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.

REFERENCES:
patent: 4695695 (1987-09-01), Meek et al.
patent: 4719078 (1988-01-01), Miyashita et al.
patent: 4744943 (1988-05-01), Timm
patent: 4778626 (1988-10-01), Ramn et al.
patent: 4813124 (1989-03-01), Klimek
patent: 4857266 (1989-08-01), Sheinberg et al.
Sutton, "Microwave Processing of Ceramic Materials", Ceramic Bulletin 68(2) (1989):376-381.
Krause, "Microwave Processing of Ceramics: An Interdisciplinary Approach, " Oak Ridge National Laboratory Review, 1 (1988):48-51.
Swain, "Microwave Sintering of Ceramics", Advanced Materials and Processes Inc. Metal Progress, Sep., 1988, 76-82.
Gabriele, "New Oil Drill Bits Made via P/M Densification Tested; and Ceracon Awarded $500,000 Numa Tool Contract for New Powdered-Metal Densification System", Metalworking News (Oct. 17, 1988).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Isostatic pressing with microwave heating and method for same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Isostatic pressing with microwave heating and method for same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isostatic pressing with microwave heating and method for same will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1887450

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.