(中南大学 粉末冶金国家重点实验室，长沙 410083)
摘 要: 以短切炭纤维、石墨粉、硅粉、树脂为原料，采用新开发的温压−熔融渗硅(WC-RMI)法制备C/C-SiC摩擦材料，对不同制动速度下材料的摩擦磨损性能进行研究，并对温压−熔融渗硅法的制备工艺过程进行理论分析。结果表明：C/C-SiC材料的密度可达1.78 g/cm3，残留单质Si的含量为0.3%，摩擦因数为0.36~0.43，体积磨损量低至0.6×10−2 cm3/MJ，且随着制动速度的增大，其磨损量迅速下降并趋于平稳；C/C-SiC材料在摩擦过程中能够形成光亮、平整、连续的摩擦膜，有效降低C/C-SiC材料的磨损量。
关键字: C/C-SiC摩擦材料；温压；熔融渗硅；摩擦磨损
warm compacted-reactive melt infiltration process
（State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:The C/C-SiC composites were prepared by a new method of warm compaction-reactive melt infiltration (WC-RMI) process with short carbon fibers, graphite powders, Si powders and resins as raw materials. The friction and wear behaviors of C/C-SiC composites at different braking speeds were investigated. And the studies on WC-RMI method in theory were carried out. The results show that the density of C/C-SiC composites is 1.78 g/cm3, residual Si content is 0.3%, the friction coefficients are 0.36−0.43 and the wear loss decreases to 0.6×10−2 cm3/MJ. And the wear loss declines sharply at first and then keeps stable as the speed increases. The bright and smooth friction film in the course of friction forms on the C/C-SiC composites, which can decrease the wear loss obviously.
Key words: C/C-SiC composites; warm compaction; reactive melt infiltration; friction and wear
