C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
25/123
C04B 41/50 (2006.01) B22F 5/00 (2006.01) B22F 5/10 (2006.01) C04B 37/02 (2006.01) C04B 37/04 (2006.01) C04B 41/51 (2006.01) C22C 1/04 (2006.01) C22C 1/10 (2006.01)
Patent
CA 1319813
ABSTRACT A process is described for making a composite article without shrinkage, particularly of ceramic and metal wherein the article includes complex internal surfaces or cavities. The process requires forming an insert body that includes an external surface that corresponds to an internal cavity of the article. The insert body consists of a material having a melting temperature less than that of the article. The process further requires forming a porous compact about the insert body wherein the compact is formed into the substantially the net shape of the article. The compact is made of a material that is wetted by liquid insert material and has a sintering temperature greater than the wetting temperature of the insert material. The process further requires heating the article to a temperature such that the inserts substantially melts and infiltrates the porous compact forming the finished composite article. The process produces products 36,764-F including complex internal surfaces without the necessity of costly and sometimes technically difficult internal machining operations. 36,764-F
597572
Jankowski Scott J.
Ott Jack J.
Pyzik Aleksander J.
Jankowski Scott J.
Ott Jack J.
Pyzik Aleksander J.
Smart & Biggar
The Dow Chemical Company
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