초록 ▼

The present invention provides a carbon-carbon composite material consisting of a matrix carbon and a fibrous reinforcing carbon, said matrix carbon and fibrous carbon consisting substantially of amorphous carbon and forming an interface without an intervening third material, wherein said composite

The present invention provides a carbon-carbon composite material consisting of a matrix carbon and a fibrous reinforcing carbon, said matrix carbon and fibrous carbon consisting substantially of amorphous carbon and forming an interface without an intervening third material, wherein said composite material has a fracture surface showing a uniform vitreous light reflection, but when it is used as an anode and electrolytically etched in sulfuric acid-acidified water, a difference in the degree of etching arises between the matrix carbon and the fibrous carbon, and a method for the preparation thereof. The composite material has a high flexural strength and a very low gas permeability and is useful as a molding material in the fields of high temperature chemistry, the atomic energy industry and medicine.

대표청구항 ▼

A method for producing a carbon-carbon composite material consisting of a matrix carbon and a fibrous reinforcing carbon, which comprises shaping a resinous composition consisting of 30 to 90% by weight of cured novolac fibers having a methylol group content of at least 3.5% by weight and 10 to 70%

A method for producing a carbon-carbon composite material consisting of a matrix carbon and a fibrous reinforcing carbon, which comprises shaping a resinous composition consisting of 30 to 90% by weight of cured novolac fibers having a methylol group content of at least 3.5% by weight and 10 to 70% by weight, as the solids content after curing, of a phenolic resin; curing the shaped product; heating the cured product in an non-oxidizing atmosphere to at least 800°C. in such a manner that at least within a temperature range of 200°to 500°C., the heating is carried out at a rate of not more than 60°C./hour; and firing the product at the final temperature reached. A carbon-carbon composite material consisting of a matrix carbon and a fibrous reinforcing carbon, said matrix carbon and fibrous carbon consisting substantially of amorphous optically isotropic carbon and forming an interface without an intervening third material, wherein said composite material has a fracture surface showing a uniform vitreous light reflection, but when it is used as an anode and electrolytically etched in sulfuric acid-acidified water, a difference in the degree of etching arises between the matrix carbon and the fibrous carbon produced by the method of claim 1.