Abstract The efficacy of microtexturing on the tribological performance of Aromatic Thermosetting CoPolyester (ATSP) and Ultra High Molecular Weight Polyethylene (UHMWPE) were investigated under oil-lubricated starved conditions. Nominal contact pressures of 5.02 and 10.04 MPa were applied over a range of sliding velocities, 0.008–2.278 m/s. Static and kinetic coefficients of friction (COF) for untextured and textured surfaces were obtained and compared. Reduction in the average kinetic COF up to 29% for microtextured ATSP and 25% for microtextured UHMWPE were obtained. Static COF did not exhibit a notable change as a result of microtexturing. The core void volume was identified as a reliable indicator of the wear intensity of the dimples and consequently lubricant retention capacity for texturing. While both microtextured polymers illustrated reduction in the kinetic COF, only ATSP showed mechanical integrity for applications that experience high contact load under starved conditions. Microtextured UHMWPE experienced mechanical failure due to fluid pressure build up in the dimples under high load tests.

中文翻译：

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表面微织构在缺乏润滑条件下增强聚合物表面摩擦学性能的功效

摘要 在油润滑饥饿条件下研究了微织构对芳香族热固性共聚酯 (ATSP) 和超高分子量聚乙烯 (UHMWPE) 摩擦学性能的影响。在 0.008-2.278 m/s 的滑动速度范围内施加 5.02 和 10.04 MPa 的标称接触压力。获得并比较了无纹理和有纹理表面的静态和动态摩擦系数 (COF)。获得了微织构 ATSP 的平均动力学 COF 降低高达 29% 和微织构 UHMWPE 的 25%。由于显微纹理，静态 COF 没有表现出显着变化。核心空隙体积被确定为凹痕磨损强度的可靠指标，因此用于纹理化的润滑剂保持能力。虽然两种微纹理聚合物都显示出动态 COF 的降低，但只有 ATSP 显示了在饥饿条件下经历高接触负载的应用的机械完整性。由于流体压力在高负载测试下在凹坑中积聚，微纹理 UHMWPE 经历了机械故障。