A study on friction and wear properties of PTFE coatings under vacuum conditions
A study on friction and wear properties of PTFE coatings under vacuum conditions
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DOI：
10.1016/j.wear.2010.04.014
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发表时间：
2010-06
期刊：
影响因子：
5
通讯作者：
Xing-dong Yuan;Xiaojun Yang
中科院分区：
文献类型：
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作者：
Xing-dong Yuan;Xiaojun Yang
在真空球盘式摩擦磨损试验机上研究了聚四氟乙烯（PTFE）涂层的摩擦磨损性能。实验结果表明，PTFE涂层的摩擦系数随滑动速度的增大先增大后减小，当滑动速度大于1.2m/s时，摩擦系数随滑动速度的增大而增大; PTFE涂层的磨损量随滑动速度的增加先减小后增大。摩擦系数随载荷的增加而减小。PTFE涂层的磨损量随载荷的增加先减小，当载荷大于6 N时，随载荷的增加又增大。环境压力对PTFE涂层的摩擦系数影响不大，空气条件下PTFE涂层的摩擦系数略高于真空条件下的摩擦系数。当环境压力大于10 Pa时，磨损量随环境压力的增大先减小后迅速增大。利用扫描电子显微镜（SEM）对磨损表面、自润滑膜和磨屑进行了观察。
The friction and wear properties of polytetrafluoroethylene (PTFE) coatings were studied in detail on a ball-on-disk wear tester under vacuum conditions. Experimental results showed that the friction coefficients of the PTFE coatings first increased with the increase of sliding velocity and then decreased with the increase of sliding velocity when the sliding velocity was higher than 1.2m/s. The wear of the PTFE coating first decreased with the increase of sliding speed and then increased as the sliding speed increased. The friction coefficient decreased with the increase of load. The wear of PTFE coating first decreased with the increase of load and then increased with the increase of load when the load was higher than 6N. The environmental pressure has insignificant effect on the friction coefficient of PTFE coating, and the friction coefficient of PTFE coating under air condition is slightly higher than that under vacuum condition. The wear first decreased with the increase of environmental pressure and then increased rapidly with the increase of environmental pressure when the pressure was higher than10Pa. Scanning electron microscope (SEM) was utilized to investigate the worn surfaces, the self-lubricating films and debris.