Polyimide composites have been extensively used as motion components under extreme conditions for their thermal stability and special self-lubricating performance. In the present study, Ag-Mo hybrids as lubricant fillers were incorporated into thermosetting polyimide to prepare a new type of tribo-materials (TPI-1) at high temperature. Comprehensive investigations at different temperatures reveal that the newly developed TPI-1 exhibits a better reduction in friction and wear rate below 100 °C, but all of them increase significantly when the bulk temperature exceeds 250 °C. The wear mechanisms demonstrated that sandwich-like tribofilms with different layers were established at different temperatures, which was further verified by characterization of scanning electron microscope (SEM), Raman spectroscopy, and transmission electron microscope (TEM). Considering the high-performance TPI coupled with Ag-Mo hybrids, we anticipate that further exploration would provide guidance for designing TPI tribo-materials that would be used at high temperatures.

中文翻译：

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探索Ag-Mo杂化改性热固性聚酰亚胺复合材料在高温下的摩擦磨损性能

聚酰亚胺复合材料因其热稳定性和特殊的自润滑性能而在极端条件下被广泛用作运动部件。在本研究中，作为润滑剂填料的Ag-Mo杂化物被掺入热固性聚酰亚胺中，以在高温下制备新型摩擦材料（TPI-1）。在不同温度下的综合研究表明，新开发的TPI-1在100°C以下表现出更好的摩擦和磨损率降低，但是当总体温度超过250°C时，所有这些都会显着增加。磨损机理表明，在不同温度下会形成具有不同层的三​​明治状摩擦膜，这已通过扫描电子显微镜（SEM），拉曼光谱和透射电子显微镜（TEM）的表征得到了进一步验证。