Ni-Mo基高温自润滑复合材料摩擦学性能的研究  

Tribological Properties of Ni-based High Temperature Self-Lubricating Composite

作　　者：李珍[1,2] 张亚丽 周健松 王静波[1] 陈建敏[1] LI Zhen;ZHANG Yali;ZHOU Jiansong;WANG Jingbo;CHEN Jianmin(State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Gansu Lanzhou 730000, China;University of Chinese Academy of Sciences, Beijing 100039, China;School of Mechanical Engineering, Chengdu Technological University, Sichuan Chengdu 611730, China)

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [2]中国科学院大学,北京100039 [3]成都工业学院机械工程学院,四川成都611730

出　　处：《摩擦学学报》2018年第2期161-169,共9页Tribology

基　　金：国家自然科学基金项目(51475444)资助~~

摘　　要：用放电等离子烧结(Spark Plasma Sintering,简称SPS)技术制备了Ni-Mo-Pb O高温自润滑复合材料,分析NiMo-Pb O复合材料的微观组织结构,研究了Ni-Mo-Pb O复合材料从室温至700℃的摩擦学性能.在烧结过程中,Pb O和Mo之间发生了氧化还原反应,SPS烧结制备的Ni-Mo-Pb O复合材料主要由Ni的固溶体、Pb和钼的氧化物组成.复合材料的摩擦和磨损性能与温度有关.Ni-Mo-Pb O复合材料的摩擦系数随着温度的增加先减小后增加.磨损率随着温度的增加先减小后稍有增加.少量的Pb O加入到镍基合金中显著改善了镍基复合材料的高温摩擦磨损性能.尤其在约500℃时,复合材料显现出非常低的摩擦系数(0.09)和磨损率[约2.8×10_(–6) mm_3/(N·m)],这归因于主要由Pb O、少量的Ni O及钼酸盐组成的致密的润滑膜的形成.Ni-Mo-PbO high temperature self-lubricating composites were prepared by spark plasma sintering. Microstructure of the composites was analyzed. The friction and wear properties of the composites were investigated from room temperature to 700 ℃. The oxidation-reduction reaction between PbO and Mo occurred during the sintering process. The phase constituents of the composites consisted mainly of Ni （Mo） solution, Pb and oxides of molybdenum. The friction and wear properties of the composites were temperature-dependent. The friction coefficient firstly decreased and then increased with increasing temperature. The wear rates of the composites firstly decreased and then slightly increased with increasing temperature. The addition of PbO improved the tribological properties of the composites at high temperature. Especially at 500 ℃, the composite exhibited a low friction （0.09） and wear rate [2.8×10^4 mma/（N.m）]. The improved tribological properties of the composites at 500 ℃ were attributed to the formation of a dense and lubricious film which consisted mainly of PbO, small amount of NiO and molybdate.

关 键 词：镍基复合材料 高温 自润滑 摩擦磨损 

分 类 号：TH117.3[机械工程—机械设计及理论]