Self-lubricating materials are becoming more widespread in fields like metal forming or power generation due to the inability to use conventional lubricants in high-temperature (HT) applications. In an effort to summarise the progress done in this field, a detailed literature review has been carried out, ranging from micron-thickness thin films to hardfacings and bulk materials, and classified by the reported solid lubricants. Moreover, the most-cited deposition techniques have been reviewed for each lubricant class in addition to their advantages and limitations. HT friction and wear data for self-lubricating materials have also been examined in order to identify effective lubrication ranges and general trends in their tribological behaviour, which is expected to be useful for researchers interested in this field. Finally, several apparent research gaps have been described, with suggestions for new experimental work that could lead to the development of new high-temperature self-lubricating materials.

中文翻译：

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自润滑材料在高温下的摩擦学行为

由于不能在高温（HT）应用中使用常规润滑剂，自润滑材料在金属成型或发电等领域变得越来越广泛。为了总结该领域的进展，已进行了详细的文献综述，范围从微米厚度的薄膜到硬化面层和块状材料，并按所报道的固体润滑剂分类。此外，除了每种润滑剂的优点和局限性之外，还针对每种润滑剂类别对最常用的沉积技术进行了审查。还已经检查了自润滑材料的HT摩擦和磨损数据，以确定其润滑性能的有效润滑范围和总体趋势，这有望对该领域的研究人员有用。最后，