▎ 摘　　要

NOVELTY - Carbon composite comprises a composite preform including carbon fiber preform, and a coating layer comprising a secondary nanomaterial formed on the surface, inside or both of the carbon fiber preform, where the pores of the composite preform are filled with matrix containing carbon and/or ceramic. The two-dimensional nanomaterials include graphene, transition metal carbide, transition metal nitride, and/or transition metal carbonitride. The carbon fiber preform comprises 0.01-10 pts. wt. 2D nanomaterial. The ceramic includes silicon, zirconium, tantalum, and/or hafnium. USE - Used as carbon composite. ADVANTAGE - The carbon composite has improved oxidation resistance, heat resistance, excellent heat conduction rate, fracture toughness and excellent binding force between the composite preform and the matrix filled in the pores of the composite preform, improves mechanical properties, and can be manufactured by a simple process. DETAILED DESCRIPTION - Carbon composite comprises a composite preform including carbon fiber preform, and a coating layer comprising a secondary nanomaterial formed on the surface, inside or both of the carbon fiber preform, where the pores of the composite preform are filled with matrix containing carbon and/or ceramic. The two-dimensional nanomaterials include graphene, transition metal carbide, transition metal nitride, and/or transition metal carbonitride. The carbon fiber preform comprises 0.01-10 pts. wt. two dimensional (2D) nanomaterial. The ceramic includes silicon, zirconium, tantalum, and/or hafnium. The 2D nanomaterial is metal based compound of formula (Mn+1Xn) (I), preferably e.g. titanium carbide and vanadium carbide. M = early transition metal, preferably Sc, Ti, V, Cr, Zr, Nb, Mo, Hf, or Ta; X = C, N or CN; and n = 1-3. An INDEPENDENT CLAIM is also included for producing carbon composite, comprising (a) preparing a composite preform by coating the carbon fiber preform with a solution in which the 2D nanomaterial is dispersed, and (b) densifying the composite preform using a chemical vapor deposition method or a polymer supported pyrolysis method which is performed using pitch, polycarbosilane, polysiloxane, silazane, borosilane, and/or silica sol.