ABSTRACT Carbon fiber-reinforced silicon carbide received increasing attention due to its superior physical properties. In the present study, the tribological characteristics of C/SiC and zirconia (ZrO2) are investigated. Moreover, the effects of the load (10∼100 N) and sliding speed (0.2∼0.8 m/s) on the tribological performance of C/SiCs are studied under dry friction and ambient temperature using a pin-on-disc tribometer. Wear surfaces of the pin and disc are examined by various methods before and after the tribology experiments to investigate the wear mechanism of the friction pair under different working conditions. The obtained results show that the contact pressure and sliding speed significantly affect the coefficient of friction (COF) and the wear rate (WR) of pin and disc. It is found that the parameters mentioned above decrease as load and speed increase. The lubricating film formed by the wear debris is found to be the key factor that affects the tribological performance. For high loads and speeds, the wear debris size decreases, contributing to the formation of the protection film and smooth wear surface during the dry friction process.

中文翻译：

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C/SiC在不同载荷和速度下的干滑动摩擦学行为

摘要碳纤维增强碳化硅由于其优越的物理性能而受到越来越多的关注。在本研究中，研究了 C/SiC 和氧化锆 (ZrO2) 的摩擦学特性。此外，使用针盘摩擦计研究了在干摩擦和环境温度下载荷（10~100 N）和滑动速度（0.2~0.8 m/s）对 C/SiCs 摩擦学性能的影响。在摩擦学实验前后通过各种方法检查销和盘的磨损表面，以研究摩擦副在不同工况下的磨损机理。所得结果表明，接触压力和滑动速度显着影响销和盘的摩擦系数（COF）和磨损率（WR）。发现上述参数随着负载和速度的增加而减小。发现由磨屑形成的润滑膜是影响摩擦学性能的关键因素。对于高载荷和速度，磨屑尺寸减小，有助于在干摩擦过程中形成保护膜和光滑的磨损表面。