초록 ▼

Disclosed is a method of making carbon/carbon composites by pyrolytic conversion of a carbonizable liquid in a pre-formed graphite body to form an amorphous carbon reinforcing matrix. Graphite fabric saturated with a carbonizable liquid is formed into the shape of the desired end product body and pl

Disclosed is a method of making carbon/carbon composites by pyrolytic conversion of a carbonizable liquid in a pre-formed graphite body to form an amorphous carbon reinforcing matrix. Graphite fabric saturated with a carbonizable liquid is formed into the shape of the desired end product body and placed in a flexible bag. The bag is evacuated to compress the formed body and the bagged body subjected to external pressure and heated. When the carbonizable liquid is heated to the curing temperature, the external pressure is reduced, causing volatile materials in the liquid to expand and form an interconnected pore structure. The formed body is thereafter heated to a temperature in excess of the curing temperature to further remove volatile materials therefrom. The cured rigid body is then transferred to a pyrolyzing furnace and rapidly heated in an inert gaseous environment directly to about 1500°F. to pyrolyze the carbonizable material and form an amorphous carbon matrix.

대표청구항 ▼

The method of making a carbon/carbon composite structure, comprising the steps of: (a) fabricating a pre-form body of the desired configuration from a graphite fabric impregnated with a carbonizable fluid comprising a phenolic resin; (b) enclosing the pre-form body in a flexible bag; (c) reducing th

The method of making a carbon/carbon composite structure, comprising the steps of: (a) fabricating a pre-form body of the desired configuration from a graphite fabric impregnated with a carbonizable fluid comprising a phenolic resin; (b) enclosing the pre-form body in a flexible bag; (c) reducing the pressure within said flexible bag to a pressure less than atmospheric; (d) enclosing said flexible bag in an enclosed containers (e) forming a pressure within said enclosed container of about 45 psia; (f) venting said flexible bag to atmosphere; (g) heating said pre-form body to a first temperature at which said carbonizable fluid is liquid and begins to cure while maintaining said pressure within said enclosed container at about 45 psia; and (h) thereafter reducing the pressure within said enclosed container to a pressure of at least about 30 psia and heating said pre-form body to a second temperature greater than the curing temperature of said carbonizable fluid.