MoS_(2)/CF改性超高分子量聚乙烯复合材料微动磨损性能研究  

The Investigation on Fretting Wear Performance of UHMWPEReinforced with MoS_(2)/CF

作　　者：辛小翠 苏瑜洁 刘昊[2] 齐振涛 XIN Xiaocui;SU Yujie;LIU Hao;QI Zhentao(School of Materials Engineering,Lanzhou Institute of Technology,Lanzhou Gansu 730050,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou Gansu 730000,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]兰州工业学院材料工程学院,甘肃兰州730050 [2]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 [3]中国科学院大学材料科学与光电技术中心,北京100049

出　　处：《润滑与密封》2024年第9期82-87,共6页Lubrication Engineering

基　　金：国家重点研发计划项目(51405478)。

摘　　要：采用热压烧结法制备一系列碳纤维(CF)和MoS_(2)相对含量不同的超高分子量聚乙烯(UHMWPE)复合材料,研究填料在基体中的分布,考察CF和MoS_(2)对UHMWPE复合材料热性能的影响;通过SRV-IV微动磨损试验机研究CF和MoS_(2)对UHMWPE复合材料微动磨损性能的影响,并对复合材料的磨损机制进行研究;考察干摩擦和去离子水润滑介质2种条件下载荷对复合材料摩擦性能的影响。结果发现:CF的加入有利于复合材料热性能的提升;与单一CF改性相比,适量CF和MoS_(2)同时改性UHMWPE更有利于复合材料摩擦学性能的提升,其中质量分数10%CF和10%MoS_(2)改性的UHMWPE复合材料在摩擦过程中能在摩擦表面形成均匀致密的转移膜,且MoS_(2)均匀分布在转移膜,这使得复合材料的摩擦磨损性能最优;复合材料在水润滑介质中具有更低的摩擦因数,其摩擦因数随着载荷的增加而上升。A series of ultra high molecular weight polyethylene(UHMWPE)composites with different relative contents of carbon fiber(CF)and MoS_(2) were prepared by hot pressing sintering method.The distribution of fillers in the matrix was studied,and the effects of CF and MoS_(2) on the thermal properties of UHMWPE composites were investigated.The effects of CF and MoS_(2) on the fretting wear properties of UHMWPE composites were studied by SRV-IV fretting wear testing,and wear mechanism of the composites was explored.The effects of dry friction and deionized water lubrication on the frictional properties of the composites were investigated.The results show that the addition of CF is conducive to the improvement of the thermal properties of composites.Compared with single CF modification,the simultaneous modification of UHMWPE with appropriate amount of CF and MoS_(2) is more conducive to improving the tribological properties of composites.The UHMWPE composite reinforced with mass fraction of 10%CF and 10%MoS_(2) can form a uniform and compact transfer film on the friction surface during the friction process,and MoS_(2) is uniformly distributed in the transfer film,which makes the composite presents the best friction and wear properties.The composite shows a lower friction coefficient in the water-lubricated medium,and the friction coefficient increases with the increase of load.

关 键 词：微动磨损 复合材料 转移膜 磨损机制 水润滑 

分 类 号：TH117[机械工程—机械设计及理论]