Preparation method of carbon/carbon PECVD bearing frame

The invention discloses a preparation method of a carbon/carbon PECVD (Plasma Enhanced Chemical Vapor Deposition) bearing frame, belongs to the technical field of composite materials, and particularly relates to a carbon/carbon PECVD bearing frame which comprises resin carbon and modified short carbon fibers coated in the resin carbon, the modified short carbon fiber comprises short carbon fiber and a vinyl caprolactam structure grafted on the surface of the short carbon fiber. According to the carbon/carbon PECVD bearing frame, a carbon fiber composite material plate is prepared from mixed slurry composed of grafted vinyl caprolactam modified short carbon fibers, a resin glue solution and an additive through an injection molding technology, then carbonization and liquid-phase resin impregnation treatment are conducted, and finally high-temperature graphitization treatment, pyrolytic carbon coating treatment and purification treatment are conducted to prepare the carbon/carbon PECVD bearing frame. The materia