Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – In specific atmosphere
Patent
1995-05-19
1998-04-28
Johnstone, Adrienne C.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
In specific atmosphere
264 291, 264 297, 264553, 264571, 264122, C01B 3102, C01B 3104, B29C 4116, B29C 7102
Patent
active
057440751
ABSTRACT:
A densified carbon matrix carbon fiber composite preform is made by vacuum molding an aqueous slurry of carbon fibers and carbonizable organic powder to form a molded part. The molded part is dried in an oven at 50.degree. C. for 14 hours and hot pressed at 2000 psi at 400.degree. C. for 3 hours. The hot pressed part is carbonized at 650.degree. C. under nitrogen for 3 hours and graphitized at 2400.degree. C. to form a graphitic structure in the matrix of the densified carbon matrix carbon fiber composite preform. The densified preform has a density greater than 1.1 g/cc.
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Bailey Jeffrey L.
Burchell Timothy D.
Klett James W.
Ericson Ivan L.
Johnstone Adrienne C.
Martin Marietta Energy Systems Inc.
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