Preparation method for carbon/carbon-copper composite material

The invention relates to a preparation method for a carbon/carbon-copper composite material, which belongs to the technical field of special carbon fiber composite materials. The preparation method mainly comprises the following preparation processes: preparation of carbon fiber green bodies; preparation of carbon/carbon preforms; and preparation of the carbon/carbon-copper composite material. The preparation processes comprise the following steps: firstly, cross-linking fibers in a pre-oxidized fiber felt of polyacrylonitrile by using needle-punching; secondly, performing carbonization on the needle-punched pre-oxidized fiber felt to form a carbon fiber needle-punched felt; thirdly, depositing pyrolytic carbon on the surfaces of the carbon fibers by using a chemical vapor infiltration (CVI) process, or densifying the carbon fibers by using a process combining the CVI process and resin impregnation, wherein the carbon fibers are adhered together through the pyrolytic carbon or the pyrolytic carbon and resin carbon to form a porous carbon/carbon composite material preform; and fourthly, performing high-temperature treatment on the porous carbon/carbon composite material preform, and impregnating the solution of copper into the carbon/carbon composite material preform by using a gas pressure infiltration method to obtain the carbon/carbon-copper composite material finally.