不同结构C/SiC复合材料的摩擦磨损性能研究  

Friction and Wear Behaviors of C/SiC Composites with Different Structure

作　　者：张军战[1] 楼建军[1] 徐永东[1] 张立同[1] 成来飞[1] 

机构地区：[1]西北工业大学超高温结构复合材料国防科技重点实验室,陕西西安710072

出　　处：《摩擦学学报》2006年第3期218-222,共5页Tribology

基　　金：教育部跨世纪人才培养计划基金资助项目(2002)

摘　　要：采用反应熔体渗透工艺制备了短切纤维C/S iC与三维针刺C/S iC复合材料,在MM-1000型摩擦磨损试验机上考察了2种结构C/S iC复合材料在模拟飞机正常着陆时的摩擦磨损性能.结果表明:短切纤维C/S iC与三维针刺C/S iC刹车盘的平均摩擦系数分别为0.31和0.39,线磨损率分别小于1.2μm/次以及2.3μm/次,质量磨损率分别小于14 mg/次与19 mg/次;随着温度的升高,2种结构C/S iC复合材料的热扩散率均降低且较小,从而使得其摩擦曲线出现“翘尾”现象;由于三维针刺C/S iC复合材料在反应熔体渗透过程中纤维受到严重损伤,故在2种结构C/S iC刹车盘对摩时,三维针刺C/S iC刹车盘出现破坏性损坏,而短切纤维C/S iC刹车盘的结构完整性较好.Short fiber C/SiC and 3D needled C/SiC composites were fabricated by reactive melt infiltration. The friction and wear behaviors of two kinds of C/SiC composites with different structure were investigated on an MM- 1000 test rig, which was built to simulate airplane normal landing condition. Results showed that the friction coefficients of short fiber C/SiC and 3D needleded C/SiC brake disks were 0.31 and 0.39, the thickness loss was lower than 1.2 μm/cycle and 2.3 μm/cycle and mass loss was lower than 14 mg/cycle and 19 mg/cycle, respectively. The coefficient of friction increased at the end of braking test because of the lower of thermal diffusivity at higher temperature. 3D needleded C/SiC was destroyed during braking test, but the structure of short fiber C/SiC was kept well due to severe damage of 3D needleded C/SiC fiber during reactive melt infiltration.

关 键 词：短切纤维 3维针刺C/SiC 摩擦磨损性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TH117.3[机械工程—机械设计及理论]