C/C复合材料在CD15W-40机油润滑状态下的摩擦性能

以炭纤维无维布与网胎叠层针刺而成的整体毡为预制体,采用化学气相渗透法制备C/C复合材料,利用MM-1000型惯性试验台研究该材料在干态和CD 15W-40柴油机油润滑状态下的室温摩擦磨损性能,并采用扫描电镜(SEM)、偏光显微镜以及三维显微镜观察分析该材料的结构形貌、摩擦表面形貌和磨屑形貌.结果表明:C/C复合材料在干...

Effect of machine oil CD15W-40 on friction properties of C/C composites

The preform of composites were needled by non-weave yarn carbon cloth and deposited by chemical infiltration method.The tribological behaviors of the composite in dry condition and in machine oil lubricating state were evaluated respectively using an MM-1000 friction and wear tester;and SEM,PLOM,OM were used to investigate the microstructure,the worn surface morphologies of the composites and the morphology of wear debris.The results show that the friction coefficient is 0.32 in dry condition and is 0.09 in oil lubricating state,respectively;the wear rate in dry condition is 1.1 μm each time and 0.6 μm each time in oil lubricating state;the Response time of the friction curve of the C/C composites in oil lubricating state is short and no tail,which is called good friction and wear properties;the oil film is formed on the friction surface of the lipo-philia C/C composites,which made the friction and wear mechanism of the C/C composites changed from abrasive wear action to partially of lubrication.