Abstract This study is a continuation of our previous work. It aims to characterize the tribomechanical and tribochemical behaviors of Ti3SiC2 in low-viscosity liquids. We found an interesting phenomenon in which the flowing and nonflowing states of ethanol are related to the tribological behavior of Ti3SiC2. Low friction and wear were obtained in flowing ethanol, which is due to the lubrication of the products of tribochemical reactions, especially the oxide scales on worn surfaces. Friction and wear are worse in nonflowing ethanol than in flowing ethanol, with a complicated evolution of coefficient of friction and high wear rate. Three stages of a tribo-oxidation evolution process contribute to the complicated evolution of the coefficient of friction. First, the formation of oxide scales contributes to low friction. Second, the breakup of oxide scales results in an abrupt increase in the coefficient of friction. Finally, scratches and abrasive wear from cumulated debris in nonflowing ethanol lead to a continuous increase in friction and wear.

中文翻译：

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Ti3SiC2在流动和非流动乙醇中对Si3N4和Al2O3的摩擦学行为

摘要 本研究是我们之前工作的延续。它旨在表征 Ti3SiC2 在低粘度液体中的摩擦力学和摩擦化学行为。我们发现了一个有趣的现象，其中乙醇的流动和非流动状态与 Ti3SiC2 的摩擦学行为有关。在流动的乙醇中获得低摩擦和磨损，这是由于摩擦化学反应产物的润滑，特别是磨损表面的氧化皮。与流动乙醇相比，非流动乙醇的摩擦和磨损更严重，摩擦系数演变复杂，磨损率高。摩擦氧化演化过程的三个阶段导致摩擦系数的复杂演化。首先，氧化皮的形成有助于低摩擦。第二，氧化皮的破裂导致摩擦系数的突然增加。最后，来自非流动乙醇中累积碎片的划痕和磨料磨损导致摩擦和磨损的持续增加。