▎ 摘　　要

The ablative properties of carbon fiber/phenolic resin (CF/PR) composites were investigated for a graphene oxide (GO)- and a graphitic carbon nitride (g-C3N4)-modified matrix with contents of 0. 05, 0. 1 and 0. 2 wt%, respectively. Both the CF/(g-C3N4-PR) and CF/(GO-PR) composites showed much better ablation resistance than the one without g-C3N4 and GO. The optimum contents of g-C3N4 and GO are both 0. 1 wt% giving mass ablation rates for CF/(0. 1% g-C3N4-PR) and CF/(0. 1% GO. PR) that were respectively 44. 42 and 28. 96% lower than that of the CF/PR composite. The addition of g-C3N4 and GO increa. ses the char yield and the degree of graphitization of the char near the fibers during ablation, which benefits heat dissipation and thereby increases the ablation resistance.