不同刹车压力下炭/炭复合材料的摩擦磨损性能  

Tribological properties of carbon/carbon composites under different braking pressures

作　　者：于澍[1] 黄伯云[1] 熊翔[1] 张传福[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《新型炭材料》2008年第2期127-132,共6页New Carbon Materials

基　　金：国家自然科学基金(50702078);国家重点基础研究发展计划973资助项目(2006CB600906)~~

摘　　要：利用光学显微镜、扫描电子显微镜和MM-1000摩擦试验机研究了刹车压力对等温CVD和热梯度CVD沉积所制炭/炭复合材料的摩擦磨损性能的影响。结果表明:随着刹车压力从0.35MPa增加到1.82MPa,材料的摩擦系数下降,质量磨损加大,其中含有RL结构材料的氧化失重低于含有SL结构的材料。含有RL结构的材料由于晶体结构比较完善,其磨屑容易发生塑性形变由颗粒状变为层片状,形成良好的润滑膜,有效地降低了氧化失重的比例。The effect of braking pressure on the tribological properties of carbon/carbon composites manufactured by isothermal and thermal-gradient chemical vapor depositions was investigated by optical microscopy, scanning electron microscopy and a laboratory dynamometer. Results indicate that the coefficient of friction decreases and weight loss increases with braking pressure from 0.35 MPa to 1.82 MPa. The oxidation erosion of rough laminar is lower than that of smooth laminar because of its better microstructure. The wear debris of rough laminar can be easily deformed plastically, leading to a thin and uniform film on the friction surface that reduces the oxidation erosion.

关 键 词：热解炭 微观结构 刹车压力 磨屑 

分 类 号：TB332[一般工业技术—材料科学与工程]