采用C和SiC共沉积的CVI技术制备了C/C ,C/C SiC梯度基、纳米基和双元基复合材料 .用光学显微镜、电子探针微观分析、透射电子显微镜和扫描电子显微镜观察了各种材料微观结构 .结果表明 ,SiC加入到碳基体里改变了热解碳的微观结构并导致了C/C复合材料性能的改善 .每种材料都各具特点 .由于它们密度低、良好的力学性能和抗氧化性能使得这些材料成为很有希望的热结构复合材料 The C / C, C / C SiC gradient, nanocomposites and binary matrix composites were prepared by CVI and CVI SiC co-deposition techniques.Using optical microscopy, electron probe microanalysis, transmission electron microscopy and scanning electron microscopy The results show that the addition of SiC into the carbon matrix changes the microstructure of the pyrolytic carbon and leads to the improvement of the properties of the C / C composites.Each material has its own characteristics.Because of their low density, good Mechanical and antioxidant properties make these materials a promising thermal structural composite