Wear behavior of SiC/PyC composite materials prepared by electromagnetic-field-assisted CVI  

电磁场辅助CVI沉积SiC/PyC复合材料的磨损性能（英文）

作　　者：涂川俊[1,2] 黄启忠[1] 熊贤至[2] 谢志勇[1] 蔡利辉 陈珊[2] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083 [2]湖南大学材料科学与工程学院,长沙410082

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第3期856-862,共7页中国有色金属学报（英文版）

基　　金：Project(2011CB605801)supported by the National Basic Research Program of China;Project(2011M500127)supported by the China Postdoctoral Science Foundation;Projects(51102089,50802115)supported by the National Natural Science Foundation of China;Projects(12JJ4046,12JJ9014)supported by the Natural Science Foundation of Hunan Province,China;Project(74341015817)supported by the Post-doctoral Fund of Central South University,China

摘　　要：Silicon carbide/pyrolytic carbon (SiC/PyC) composite materials with excellent performance of self-lubrication and wear resistance were prepared on SiC substrates by electromagnetic-field-assisted chemical vapor infiltration (CVI). The composition and microstructure of the SiC/PyC materials were investigated in detail by XRD, SEM and EDS, etc. The effects of the deposition temperature on the section features and wear resistance of the SiC/PyC were studied. The results show that the PyC layers were deposited onto SiC substrates spontaneously at a lower deposition temperature. The SiC substrates deposited with PyC can significantly reduce the wear rate of the self-dual composite materials under dry sliding condition. The wear tests suggest that the SiC/PyC composite materials own a better wear resistance property when the deposition temperature is 800 °C, and the wear rate is about 64.6% of that without the deposition of PyC.采用电磁场辅助CVI沉积在SiC陶瓷基体上沉积热解炭,制得具有自润滑性和耐磨性的SiC/PyC复合材料。利用XRD、SEM和EDS等手段对SiC/PyC材料的成分和显微结构进行表征,研究沉积温度对SiC/PyC材料的截面结构和耐磨性能的影响。结果表明,在较低温度下可将热解炭引入SiC基体,并可降低与自对偶材料在干滑动摩擦条件下的磨损率。磨损试验结果表明,在沉积温度为800℃条件下制得的SiC/PyC材料具有较优的抗磨损性能,其磨损率为未沉积热解炭的SiC材料磨损率的64.6%。

关 键 词：SiC/PyC composite materials wear performance SELF-LUBRICATING chemical vapor infiltration interfacial adsorption 

分 类 号：TB306[一般工业技术—材料科学与工程]