Tribology Letters ( IF 2.9 ) Pub Date : 2021-07-03 , DOI: 10.1007/s11249-021-01476-0 Yuanyuan Jiang 1 , Lei Chen 1 , Chen Xiao 1 , Linmao Qian 1 , Ningning Zhou 2 , Tao Qing 2
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Abstract
Wear of polyimide composite cage due to lubrication failure has a significant impact on the lifetime of bearing, but the related mechanisms are still far from understanding due to the complex movements of bearing parts, such as rolling, sliding et al. in the real operations. Here, the tribological behaviors of polyimide composite against steel ball were studied under a motion compounded with rolling and sliding in comparison with pure sliding. The rolling-sliding motion has a strong influence on the tribological properties of polyimide composite depending on lubrication conditions. Especially under PAO4 oil lubrication, the rolling-sliding motion can facilitate the degradation of polyimide composite, resulting in severe surface wear and aboundant black products forming. The analysis based on XPS and SEM measurements and the compared results from heating sliding test and thermal treatments indicates that the formation of black products is mainly attributed to the tribochemical reactions accompanying with the rupture of C–O and C = O bonds due to high frictional temperature. This process is further facilitated when the PAO4 oil and the metal from counterface participate in the tribochemical reactions.
Graphical Abstract
中文翻译：
滚滑运动下钢球对聚酰亚胺-聚四氟乙烯复合材料的摩擦磨损行为
摘要
聚酰亚胺复合保持架由于润滑失效而导致的磨损对轴承的寿命有显着影响，但由于轴承部件的滚动、滑动等复杂运动，相关机制还远未了解。在实际操作中。在这里，与纯滑动相比，聚酰亚胺复合材料在滚动和滑动复合运动下对钢球的摩擦学行为进行了研究。根据润滑条件，滚动滑动运动对聚酰亚胺复合材料的摩擦学性能有很大影响。特别是在PAO4油润滑下，滚动滑动会促进聚酰亚胺复合材料的降解，导致表面磨损严重，形成大量黑色产物。基于 XPS 和 SEM 测量的分析以及加热滑动试验和热处理的比较结果表明，黑色产物的形成主要是由于高摩擦引起的 C-O 和 C=O 键断裂伴随的摩擦化学反应。温度。当 PAO4 油和来自对接面的金属参与摩擦化学反应时，这个过程会得到进一步促进。
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