Abstract High-temperature tribology of steel components is typically characterized by high friction and excessive wear, which need to be addressed. In the present study, the tribological properties of an alkali borate were evaluated in a steel contact by ball-on-disc testing over a wide range of temperatures (600–800 °C) and loads. The compound exhibits good lubrication performance consistently throughout the whole testing range. On the rubbing disc, the formation of a tribofilm with a hierarchical structure is the determining factor for the friction-reducing and wear-inhibiting capacity of the lubricant. Worn surfaces were characterized by scanning electron microscopy (SEM) and cross-sectional observations of the tribo-interface were accomplished by scanning transmission electron microscopy (STEM) coupled with energy-dispersive spectroscopy (EDS). Secondary ion mass spectroscopy (SIMS) was employed to generate an elemental depth profile of the lubricated surface.

中文翻译：

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无机硼酸盐在高温下的摩擦学性能

摘要 钢构件的高温摩擦学具有典型的高摩擦和过度磨损的特点，需要加以解决。在本研究中，通过在很宽的温度范围（600-800°C）和负载下进行球盘测试，评估了碱金属硼酸盐在钢接触中的摩擦学性能。该化合物在整个测试范围内始终表现出良好的润滑性能。在摩擦盘上，形成具有层次结构的摩擦膜是润滑剂减摩和抑制磨损能力的决定因素。磨损表面通过扫描电子显微镜 (SEM) 进行表征，摩擦界面的横截面观察通过扫描透射电子显微镜 (STEM) 结合能量色散光谱 (EDS) 完成。