Method for preparing a carbon/carbon composite material

Details Method for preparing a carbon/carbon composite material Method for preparing a carbon/carbon composite material

1995-08-29

1996-12-24

Bell, Janyce

Coating processes

Heat decomposition of applied coating or base material

Coating decomposed to form carbide or coating carbonized

427369, 427371, 427379, 4273855, B05D 302

Patent

active

055872034

ABSTRACT:
A method for preparing a carbon/carbon composite material which is characterized in that a carbon preform is impregnated with a carbonaceous pitch exhibiting a densification parameter of 0.1 or more, said densification parameter being represented by the following formula (1), and then subjected to an isotactic compression at a pressure higher than the atmospheric pressure but not higher than 10 Kgf/cm.sup.2 and at a sintering temperature of 250.degree. to 3,000.degree. C., thereby densifying the carbon preform:
Densification parameter={(Weight of a sintered carbonaceous pitch (hereinafter, referred to simply as a sintered product) to be obtained through a process where a carbonaceous pitch in an open-type container is heated from room temperature up to 1000.degree. C. at a rate of 2.degree. C./min., and then sintered for 2 hours at 1000.degree. C. under isotactic compression of 9.5 Kgf/cm.sup.2)}/(Weight of a carbonaceous pitch before being sintered).times.{(Bulk density of the sintered product in the open-type container)/(True density of the sintered product)}. . . (1).

REFERENCES:
patent: 4226900 (1980-10-01), Carlson et al.
patent: 5022343 (1991-06-01), Fujikawa et al.
patent: 5137755 (1992-08-01), Fujikawa et al.
patent: 5181979 (1993-01-01), Uemura et al.
Carbon, vol. 11, pp. 570-574, 1973 E. Fitzer et al, "The pryolysis . . . "(no mo.).

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