低温模压法制备的C/C-SiC复合材料的摩擦磨损性能  

Friction and wear behavior of C/C-SiC composites manufactured by warm moulding compaction

作　　者：吴庆军[1] 熊翔[1] 肖鹏[1] 闫志巧[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2005年第6期365-369,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：教育部科学技术研究重点资助项目(02148)

摘　　要：为深入了解低成本法制备的C/C-SiC复合材料的摩擦磨损规律,以短炭纤维、Si粉、炭粉和粘结剂为原料,通过均匀混合、模压成形、1 600℃反应烧结制备了C/C-SiC复合材料,研究了孔隙度、SiC含量及环境湿度对该复合材料摩擦磨损性能的影响,并用光学显微镜及X射线衍射仪对磨屑进行观测分析,对不同状况下的摩擦磨损机理进行研究。结果表明:C/C-SiC复合材料的致密度决定其磨损方式;SiC在摩擦过程中作为硬质支撑点,其含量对摩擦系数及其稳定性具有关键性影响;湿态时的摩擦系数与线磨损均略有下降,但仍能保持其良好的摩擦磨损性能。C/C-SiC composites were manufactured through three major steps,namely mixing short carbon fiber,silicon powder,carbon powder and binder,then molding compaction and finally reactive sintering at 1600℃.The friction and wear behavior of samples with different density,SiC content and surrounding humidity were tested.Wear debris was detected by optical microscope(OM) and X-ray diffraction(XRD),and friction and wear mechanism was discussed deeply.The results show that the porosity of the manufactured C/C-SiC composites determines its wear mechanism;SiC sustains the most pressure as a kind of hard phase,and its content influences the frictional coefficient.Surrounding humidity doesn't cause large frictional coefficient drop.

关 键 词：C/C-SIC复合材料 模压 磨损机理 

分 类 号：TB332[一般工业技术—材料科学与工程]