C/C composites prepared by chemical vapor infiltration (CVI) were subjected to high temperature treatment (HTT) at 2300 °C under an Ar atmosphere. C/C-SiC composites were prepared by liquid silicon infiltration (LSI) of the C/C composites before HTT. The C/C composites before (A) and after (B) HTT were mated with the C/C-SiC to form friction pairs to investigate their tribological properties. Results indicated that the average coefficient of friction (COF) and stable COF of the C/C-B are 0.280 and 0.65 while that of the C/C-B are 0.451 and 0.55, respectively. The average linear wear rate of the C/C-A and the C/C-B are 3.7 and 8.9 μm/(slide cycle), respectively. SEM reveals that the wear debris of the C/C-A is particulate while that of the C/C-B are the sheets, and the friction surface is more flat for C/C-B than C/C-A. HTT leads to a softening of the carbon, increases the wear rate, but improves the stable COF of the C/C composites. The wear mechanisms of the composites are mainly grain-abrasion, oxidation loss and fatigue wear.

通过化学气相渗透（CVI）制备的C / C复合材料在2300°C的Ar气氛下进行高温处理（HTT）。C / C-SiC复合材料是通过HTT之前的C / C复合材料的液硅渗透（LSI）制备的。将HTT之前（A）和之后（B）的C / C复合材料与C / C-SiC配对形成摩擦副，以研究其摩擦学性能。结果表明，C / CB的平均摩擦系数（COF）和稳定的COF分别为0.451和0.55，而C / CB的平均摩擦系数为0.451和0.55。C / CA和C / CB的平均线性磨损率分别为3.7和8.9μm/（滑动周期）。SEM显示，C / CA的磨屑是颗粒状的，而C / CB的磨屑是片状的，与C / CA相比，C / CB的摩擦表面更平整。HTT导致碳软化，增加磨损率，但改善了C / C复合材料的稳定COF。复合材料的磨损机理主要是颗粒磨损，氧化损失和疲劳磨损。