Tribological properties of nickel-graphite composite against different counterfaces at elevated temperatures

摘要：

Nickel-based graphite-containing composites were prepared by powder metallurgy method.The effect of graphite addition on mechanical properties of nickel-based alloy was investigated and the tribological properties from room temperature to 600 ℃ were tested by a pin-on-disk tribometer with alumina,silicon nitride and nickel-based alloy as counterfaces.The microstructure was analyzed by X-ray diffraction(XRD) and scanning electron microscope (SEM) attached with energy dispersive spectroscopy(EDS).The worn surfaces at high temperature were observed by optical microscope and SEM.The results show that the tensile strength and hardness of composites decrease after adding graphite,while the friction and wear properties are all improved by adding 12％(mass fraction) graphite.Compared with the counterface of alumina and silicon nitride,the friction coefficients and wear rates are lower when the composite rubs against nickel-based alloy containing molybdenum disulfide.

关键词： high-temperature solid lubrication self-lubricating composite Ni-based alloy graphite

作者: LI Jian-liang XIONG Dang-sheng WAN Yi

作者单位: Department of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）