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Preparation method of HfC-SiC modified carbon/carbon composite material

The invention discloses a preparation method of an HfC-SiC modified carbon/carbon composite material and can be used for solving the technical problem that a composite material prepared by adopting the existing carbon/carbon composite material preparation method has poor mechanical properties. According to the technical scheme, an organic precursor solution containing hafnium and silicon is utilized, a porous carbon/carbon composite material is impregnated under the vacuum condition at normal temperature, then heat treatment is carried out at a high temperature, a series of chemical reactions are carried out, so that a carbon/carbon composite material containing HfC and SiC is obtained, and finally a high density HfC-SiC modified carbon/carbon composite material is obtained after cyclic impregnation and heat treatment is carried out. The preparation method of the HfC-SiC modified carbon/carbon composite material has the advantages that the porous carbon/carbon composite material is prepared by adopting a thermal gradient chemical vapour deposition method, and a thermolysis carbon layer is formed on carbon fibers, so that the carbon fibers are protected and can not be damaged; and a polycarbosilane precursor liquid phase impregnation pyrolysis method is adopted, SiC can be doped into a material, wettability between HfC ceramic and a matrix is improved, density is increased, and erosion resistance of the composite material is further improved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
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