Friction and wear of PEEK in continuous sliding and unidirectional scratch tests
Friction and wear of PEEK in continuous sliding and unidirectional scratch tests
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DOI：
10.1016/j.triboint.2018.02.035
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发表时间：
2018-06
影响因子：
6.2
通讯作者：
Leyu Lin;Xianqiang Pei;R. Bennewitz;A. Schlarb
中科院分区：
文献类型：
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作者：
Leyu Lin;Xianqiang Pei;R. Bennewitz;A. Schlarb
采用两种不同的摩擦磨损试验方法，即标准销盘结构和单向销盘划痕试验，研究了一种商用聚醚醚酮在0.001~8 m/S条件下的干滑动摩擦磨损性能。结果表明，随着滑动速度的增加，稳态摩擦系数略有下降，滑动速度从0.1m/S增加到1 m/S，再增加到4 m/S，摩擦系数明显增加。认为这是由于PEEK表面与钢对偶体之间的界面温度较高而引起的粘附性强。在所研究的范围内，POD和POF的摩擦系数没有明显差异。在磨损率方面，由POD测得的磨损率随着速度的单调增加而增加。根据对钢对偶面上形成的聚合物试件和转移膜的磨损表面的分析，以及对不同摩擦系统的热特性的研究，讨论了产生这些现象的可能原因。
Friction and wear of a commercially available polyetheretherketone were investigated by two different testing approaches, namely the standard pin-on-disc (POD) configuration and an unidirectional pin-on-flat (POF) scratch test, in a wide range of pv-products from 0.001 to 8 MPa m/s under dry sliding condition. It was found that the steady state friction coefficient gained from POD tests slightly decreases with increasing sliding velocity from 0.1 to 1 m/s, further increase in the velocity to 4 m/s results in an obvious raise of the friction coefficient. It is assumed that this increase can be attributed to the high interfacial temperature induced strong adhesion between PEEK surface and steel counterbody. No obvious difference of the friction coefficients between POD and POF tests is noted in the studied range. With respect to the wear rate, the wear rate measured from POD increases with monotonously increasing velocity. Possible reasons for these observations are discussed based on the analysis of the worn surfaces of polymer samples and transfer films formed on the steel counterface as well as the investigations on the thermal characteristics of different tribo-systems.