Tribology Letters ( IF 2.9 ) Pub Date : 2021-08-27 , DOI: 10.1007/s11249-021-01489-9 Kun Qin 1, 2 , Qin Zhou 1, 2 , Kai Zhang 1, 2 , Shuaishuai Li 1, 2 , Minghao Lv 1, 2 , Bairu Xia 1, 2 , Shixin Bai 1
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Abstract
Due to thermal degradation, the tribological performance of fluororubber (FKM) at high temperature is not satisfactory, despite its excellent temperature resistance. In this paper, the friction and wear process of FKM O-rings were traced by the tribo-test, which compares the wear behaviors at different stages of the wear process. Results showed that under the influence of thermal degradation of FKM, the wear rate and friction coefficient decrease, while the friction instability increases. This phenomenon is caused by the deterioration of the mechanical properties affects the development of the typical wear pattern of FKM in unsteady state (running-in stage). The wear debris is more likely to adhere to the surface of the wear scar, which causes the friction form to change from two-body abrasion to three-body abrasion. Findings from this study can enhance understanding of tribology behaviors of FKM O-ring seals under the high temperature condition and can help develop higher-performance alternatives.
Graphic Abstract
中文翻译：
磨损舌发展的差异：热降解对 FKM O 型圈密封件摩擦学行为的影响
摘要
由于热降解，氟橡胶（FKM）尽管具有优异的耐温性，但在高温下的摩擦学性能并不令人满意。在本文中，FKM O 型圈的摩擦和磨损过程通过摩擦试验进行追踪，比较了磨损过程不同阶段的磨损行为。结果表明，在FKM热降解的影响下，磨损率和摩擦系数降低，而摩擦不稳定性增加。这种现象是由于机械性能的恶化影响了非稳态（磨合阶段）FKM 典型磨损模式的发展。磨屑更容易附着在磨痕表面，使摩擦形式由二体磨耗转变为三体磨耗。
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