PTFE基复合材料海水润滑下的摩擦学性能研究  

Tribological Characteristics of PTFE Matrix Composites under Seawater Lubrication

作　　者：邹辛祺 葛正浩[1] 王超宝 陈威[1] ZOU Xinqi;GE Zhenghao;WANG Chaobao;CHEN Wei(College of Mechanical&Electrical Engineering,Shaanxi University of Science&Technology,Xi’an Shaanxi 710021,China)

机构地区：[1]陕西科技大学机电工程学院,陕西西安710021

出　　处：《润滑与密封》2023年第11期123-129,共7页Lubrication Engineering

基　　金：国家水运安全工程技术研究中心基金项目(8111125);陕西省自然科学基金项目(2023-JC-YB-346);陕西省教育厅科研项目(22jc009)。

摘　　要：研究碳纤维/聚四氟乙烯(CF/PTFE)、玻璃纤维/聚四氟乙烯(GF/PTFE)复合材料与氮化硅陶瓷配副在海水环境下的摩擦学性能与润滑机制,分析滑动速度对摩擦副海水润滑性能的影响规律。结果表明:在海水润滑条件下,随着滑动速度的增加,PTFE、CF/PTFE、GF/PTFE材料与Si3N4陶瓷配副时的摩擦学性能均有明显改善,摩擦因数与磨损率均呈显著降低的趋势,其中CF/PTFE复合材料表现出更为优异的摩擦学性能,在1000 r/min滑动速度下摩擦因数低至0.026。磨损表面表征结果表明,在海水润滑条件下,PTFE基复合材料在摩擦过程中由于摩擦化学反应生成了润滑膜,可为摩擦副提供良好的润滑和减磨作用,从而减少摩擦磨损行为的发生。The tribological properties and lubricating mechanisms of carbon fiber/polytetrafluoroethylene(CF/PTFE)and glass fiber/polytetrafluoroethylene(GF/PTFE)composites were investigated when paired with silicon nitride ceramics in a seawater environment.The effects of sliding velocities on the friction and wear performances were analyzed.The results show that the tribological properties of PTFE,CF/PTFE,GF/PTFE materials paired with Si3N4 ceramics are significantly improved with the increase of sliding velocities in a seawater environment,and the friction coefficient and wear rate show a significant decrease trend.CF/PTFE composite exhibits superior tribological properties,with a friction coefficient as low as 0.026 at a sliding velocity of 1000 r/min.The characterization results of the worn surface indicate that PTFE based com⁃posite materials generate a lubricating film during the friction process due to tribochemical reaction in a seawater environ⁃ment,which can provide good lubrication and wear reduction effects for the friction pair,thereby reducing the occurrence of friction and wear behavior.

关 键 词：聚四氟乙烯 复合材料 氮化硅陶瓷 海水润滑 摩擦性能 

分 类 号：TH117.1[机械工程—机械设计及理论]