Abstract The influence of high hydrostatic pressure on tribological characteristics of carbon fiber reinforced Poly-ether-ether-ketone (CF/PEEK) against 431 stainless steel (431SS) was investigated. Hydrostatic pressure ranged from normal pressure to 80 MPa at a step of 20 MPa to simulate the environmental pressure of the deep ocean. The results suggest that the average friction coefficient decreases with increased hydrostatic pressure. Hydrostatic pressure helps reduce the wear rates of CF/PEEK and 431SS. As the pressure increases, the main wear and friction mechanism of CF/PEEK changes from adhesive wear to fatigue wear, while the main wear mechanism of 431SS is abrasive wear. Compared with the sliding surface after normal pressure experiments, the surface roughness Ra of CF/PEEK will be smaller after high pressure experiments. The crystallinity of CF/PEEK decreases linearly with hydrostatic pressure, indicating a possible decline in mechanical properties. Moreover, comprehensive results suggest that this friction pair can be used under the hydrostatic pressure up to 80 MPa.

中文翻译：

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高静压水润滑下CF/PEEK与431不锈钢的摩擦磨损特性

摘要 研究了高静水压力对碳纤维增强聚醚醚酮(CF/PEEK)与431不锈钢(431SS)摩擦学特性的影响。静水压力范围从常压到 80 MPa，步长为 20 MPa，以模拟深海环境压力。结果表明，平均摩擦系数随着静水压力的增加而降低。静水压力有助于降低 CF/PEEK 和 431SS 的磨损率。随着压力的增加，CF/PEEK的主要磨损和摩擦机制由粘着磨损转变为疲劳磨损，而431SS的主要磨损机制是磨粒磨损。与常压实验后的滑动面相比，CF/PEEK的表面粗糙度Ra在高压实验后会更小。CF/PEEK 的结晶度随静水压力呈线性下降，表明机械性能可能下降。此外，综合结果表明，该摩擦副可在高达 80 MPa 的静水压力下使用。