2．5D碳／酚醛模压复合材料的性能研究

摘要

采用真空浸胶技术和模压成型工艺研制2．5D编织碳纤维/酚醛新型树脂基防热复合材料，对材料的拉伸性能、烧蚀性能和热常数等进行了测试。结果表明：2．5D碳/酚醛模压复合材料拉伸强度为424 MPa、拉伸模量为66．4 GPa，氧-乙炔线烧蚀率为0．013 mm/s，质量烧蚀率为0．049 g/s，比热容大于1．1 J/（g· K），导热系数小于0．6 W/（m · K），与传统的短纤维、碳布增强的酚醛模压材料相比，2．5D碳/酚醛模压复合材料具有较好的综合性能，可作为结构防热一体化复合材料。%2.5D braided carbon/phenolic composite as new resin matrix thermal protection material was investigated by vacuum impregnation and compression molding .Tensile properties ,ablative properties and thermal constants of the compos-ite were studied.Results indicated the tensile and tensile modulus were 424 MPa,66.4 GPa.The linear ablation rate and mass ablation rate of oxyacetylene were 0.013 mm/s and 0.049 g/s.The thermal conductivity didn’t exceed 0.6 W/(m· K).The specific heat exceed 1.1 J/(g· K).The combined performance of 2.5D braided carbon/phenolic compression composite was better than that of chopped fiber phenolic composite or carbon cloth phenolic .It can bused as thermal protec-tion and structural material .