(中南大學(xué) 粉末冶金國家重點實驗室，長沙 410083)
摘 要: 以短切炭纖維、石墨粉、硅粉、樹脂為原料，采用新開發(fā)的溫壓−熔融滲硅(WC-RMI)法制備C/C-SiC摩擦材料，對不同制動速度下材料的摩擦磨損性能進(jìn)行研究，并對溫壓−熔融滲硅法的制備工藝過程進(jìn)行理論分析。結(jié)果表明：C/C-SiC材料的密度可達(dá)1.78 g/cm3，殘留單質(zhì)Si的含量為0.3%，摩擦因數(shù)為0.36~0.43，體積磨損量低至0.6×10−2 cm3/MJ，且隨著制動速度的增大，其磨損量迅速下降并趨于平穩(wěn)；C/C-SiC材料在摩擦過程中能夠形成光亮、平整、連續(xù)的摩擦膜，有效降低C/C-SiC材料的磨損量。
關(guān)鍵字: C/C-SiC摩擦材料；溫壓；熔融滲硅；摩擦磨損
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
