采用透射电子显微镜(TEM)、扫描电子显微镜(SEM)等手段研究了基体炭分别为树脂炭和粗糙层热解炭结构的C/C复合材料的微观结构,并探讨了材料的微结构对其制动摩擦磨损性能的影响.结果表明:炭纤维附近的树脂炭被高度石墨化,导致树脂炭样件具有适当、稳定的摩擦系数;树脂炭片层之间存在明显的裂纹,远离炭纤维的树脂炭仍是各向同性结构,容易被剪切力剪断,产生大量碎屑,破坏了摩擦动态平衡,磨损量大是制约其作为优良制动摩擦材料的关键因素. The microstructure of C / C composites with charcoal and charcoal pyrolytic carbon was investigated by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The microstructure of the composites was also investigated. The results show that the resin carbon in the vicinity of the carbon fiber is highly graphitized, resulting in an appropriate and stable coefficient of friction for the resin-carbon sample. There are obvious cracks between the resin carbon sheets and away from the carbon fibers Resin charcoal is still isotropic structure, easily shear shear, resulting in a large number of debris, destroy the dynamic balance of friction, wear large amount of constraints as a key brake friction material.