Formation and effect of third-body patches in the tribological contact space of plastic-based high-performance tribological materials in sliding contact with steel

了解摩擦学材料的摩擦磨损机理是进一步开发此类材料的重要基础。特别是在塑料基摩擦材料的情况下，在与钢的滑动接触过程中，在钢基体上形成转移膜，这反过来改变了塑料基基体接触空间的形态。例如，在与项目相关的初步工作中，研究表明，在一定条件下，亚微米级组分在塑料基混合基体的增强纤维前面积聚。这些所谓的“第三体补丁”对滑动副的摩擦学行为有决定性的影响，在这种情况下是有利的。该项目的目标是探索并最终揭示由聚合物基体、碳纤维增强材料、内部润滑剂和亚微米或纳米级颗粒组成的基体组成与摩擦学载荷谱之间的关系，特别强调“第三体斑块”的形成。了解这些微观结构特征不仅可以加深对聚合物/金属摩擦系统摩擦学机制的认识，而且可以为开发具有优异摩擦磨损性能的聚合物基复合材料铺平道路。

Understanding on the friction and wear mechanisms of tribological materials is the crucial basis for the further development of such materials. Particularly in the case of plastic-based tribomaterials, a transfer film forms on the steel counterbody during sliding contact with steel, which in turn changes the morphology in the contact space of the plastic-based base body. In project-related preliminary work, for example, it was shown that under certain conditions submicroscale components accumulate in front of the reinforcing fibers of a plastic-based hybrid base body. These so-called " third-body patches" then have a decisive, and in this case advantageous, influence on the tribological behavior of the sliding pair. The objectives of the project are to explore and ultimately uncover the relationships between the composition of a base body, consisting of a polymeric matrix, a carbon fiber reinforcement, an internal lubricant, and submicro- or nanoscale particles, and the tribological load spectrum, with particular emphasis on the formation of "third-body patches." Understanding these microstructure features will not only deepen the knowledge of the tribological mechanisms of polymer/metal tribosystems, but also pave the way for the development of polymer-based composites with excellent friction and wear performance.