制动速度对C/C-SiC复合材料摩擦磨损性能的影响  

Effect of Braking Speed on Friction Properties of C/C-SiC Composites

作　　者：肖鹏[1] 熊翔[1] 任芸芸[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：《摩擦学学报》2006年第1期12-17,共6页Tribology

基　　金：教育部科学技术研究重点项目资助(02148)

摘　　要：采用模拟刹车制动方法研究“温压-原位反应法”制备的C/C-S iC复合材料在不同制动速度下的摩擦磨损性能,分别用光学显微镜和扫描电子显微镜对摩擦表面及其磨屑形貌进行观察,用X射线衍射仪分析磨屑成分.结果表明:摩擦系数随制动速度提高先升高而后降低,在制动速度为10 m/s时达到最大值0.46,且当制动速度超过20 m/s时产生高频振动;随着制动速度提高,磨屑愈被碾磨变细,且磨损量随之增大,在制动速度为28 m/s时线性磨损量急剧升至8.75μm;C/C-S iC复合材料在中等能载(1.5 kJ/cm2)条件下具有优良的摩擦磨损性能.Friction properties of C/C-SiC composites, manufactured by ＂warm compacted-in situ reacted＂ process, were investigated with an inertial braking apparatus at different braking speeds. The worn surfaces and the wear debris were examined with SEM, and the wear debris were analyzed with XRD. The results show that, with the braking speed increasing, the frictional coefficient rise to the maximum of 0.46 at 10 m/ s firstly and then fall, and at the same time the high frequent vibration begin to appear over 20 m/s; on the other hand, the wear debris are grind smaller and smaller, that lead to increase wear rates to the maximum of 8. 75 μm at 28 m/s. This kind of C/C-SiC composites have better friction and wear properties on the energy condition of about 1.5 KJ/cm^2.

关 键 词：C/C-SIC复合材料 制动速度 摩擦磨损性能 高速列车 

分 类 号：TB331[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]