Tribological Behavior of Nano-ZrO2 Reinforced PTFE-PPS Composites  

作　　者：CAO Wenhan GONG Jun WANG Honggang 曹文翰;龚俊;QI Yuan;YANG Dongya;GAO Gui;王宏刚;REN Junfang;CHEN Shengsheng(School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;State Key Laboratory of Solid Lubrication, L anzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China)

机构地区：[1]School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China [2]State Key Laboratory of Solid Lubrication, L anzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2019年第3期527-533,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(Nos.51165022,51675509)

摘　　要：Polytetrafluoroethylene (PTFE) is a commonly used seal material for oil-free engine that is well known for its excellent tribological properties. In this work, the nano-ZrO2 particles were used as the friction modifiers to improve the friction and wear performance of PTFE-PPS composites. The friction and wear characteristics of PTFE/PPS-nano-ZrO2 composites were investigated by a block-on-ring tester under dry friction sliding condition. The worn surfaces, counterpart transfer films and wear debris were studied by scanning electron microscopy and X-ray photoelectron spectroscopy. It was found that the increase of nano- ZrO2 content could effectively reduce the coefficient of friction and enhance the anti-wear ability of PTFEPPS composites. Especially, the best tribological properties of the composites were obtained when the particle content of nano-ZrO2 was 10 vol%, the anti-wear performance of composite is 195 times better than that of the unfilled PTFE-PPS composite. Under different conditions, the coefficient of friction of PTFE/PPS-nano-ZrO2 composites was more affected by the applied load while the wear rate was more affected by the sliding velocity.Polytetrafluoroethylene（PTFE） is a commonly used seal material for oil-free engine that is well known for its excellent tribological properties. In this work, the nano-ZrO2 particles were used as the friction modifiers to improve the friction and wear performance of PTFE-PPS composites. The friction and wear characteristics of PTFE/PPS-nano-ZrO2 composites were investigated by a block-on-ring tester under dry friction sliding condition. The worn surfaces, counterpart transfer films and wear debris were studied by scanning electron microscopy and X-ray photoelectron spectroscopy. It was found that the increase of nanoZrO2 content could effectively reduce the coefficient of friction and enhance the anti-wear ability of PTFEPPS composites. Especially, the best tribological properties of the composites were obtained when the particle content of nano-ZrO2 was 10 vol%, the anti-wear performance of composite is 195 times better than that of the unfilled PTFE-PPS composite. Under different conditions, the coefficient of friction of PTFE/PPS-nano-ZrO2 composites was more affected by the applied load while the wear rate was more affected by the sliding velocity.

关 键 词：NANO-ZRO2 PTFE-PPS TRIBOLOGICAL behavior TRANSFER films 

分 类 号：TB[一般工业技术]