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Molecular Coverage Determines Sliding Wear Behavior of n-Octadecylphosphonic Acid Functionalized Cu–O Coated Steel Disks against Aluminum

机译:分子覆盖率决定正十八烷基膦酸官能化的Cu-O涂层钢盘对铝的滑动磨损行为

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摘要

The sliding wear behavior of Cu–O coated steel disks functionalized with -octadecyl-phosphonic acids was evaluated against aluminum in ball-on-disk tribometer experiments. After 5 m of sliding the friction coefficient of the functionalized sample with maximum molecular coverage is ≤0.3 ± 0.1. Surfaces with lower coverage mitigate friction and wear as well exhibiting initially similar low friction coefficients but reveal the breakdown of lubrication for sliding distances <5 m. The length of the low friction sliding distance before breakdown scales with the coverage of -octadecylphosphonic acids on the Cu–O surface. Coverage hence determines the tribological behavior of the functionalized surface against sliding aluminum. As the coverage is increased, detrimental asperity contacts between the rubbing surfaces are reduced.
机译:在圆盘式摩擦计实验中,对用-十八烷基膦酸官能化的Cu-O涂层钢盘的滑动磨损行为对铝进行了评估。滑动5 m后,最大分子覆盖率的功能化样品的摩擦系数≤0.3±0.1。覆盖率较低的表面最初会表现出相似的低摩擦系数,从而减轻了摩擦和磨损,但在滑动距离<5 m时却显示出润滑失效。击穿前的低摩擦滑动距离的长度与Cu-O表面上的-十八烷基膦酸的覆盖率成比例。因此,覆盖率决定了功能化表面对滑动铝的摩擦学行为。随着覆盖率的增加,摩擦表面之间有害的粗糙接触减少。

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