The structure and mechanical and tribological properties of composites based on a thermoplastic matrix of polyetheretherketone (PEEK) loaded with carbon fibers of various (nano-, micro and millimeter) sizes were studied. The research is aimed at developing composites applicable for use both in metal–polymer and ceramic–polymer tribojoints, including endoprostheses. It is shown that the surface layer of the PEEK composite loaded with carbon nanofibers can play a damping role in the friction process. This ensures an increased in wear resistance by 1.5–2 times. Carbon fibers of micron and millimeter length play a reinforcing role. Thus, the wear resistance of PEEK composites can be increased up to seven times in metal–polymer tribojoints, while this is reduced by 16 times in ceramic–polymer tribojoints. It is shown that by choosing the type and weight fraction of fiberlike fillers (carbon nano/micro/millimeter fibers) in PEEK matrix, the tribological and mechanical properties can be purposefully increased. This makes it possible to expand areas of application and product range for tribojoints in mechanical engineering and medicine, including those formed using additive technologies.

中文翻译：

---

聚醚醚酮基复合材料热塑性基体的减摩和力学性能

研究了基于载有各种（纳米，微米和毫米）大小碳纤维的聚醚醚酮（PEEK）热塑性基质的复合材料的结构，力学和摩擦学性能。该研究旨在开发适用于金属-聚合物和陶瓷-聚合物摩擦接头（包括内修复物）的复合材料。结果表明，负载有碳纳米纤维的PEEK复合材料的表面层可以在摩擦过程中起到阻尼作用。这样可确保将耐磨性提高1.5–2倍。微米和毫米长的碳纤维起着增强作用。因此，在金属-聚合物摩擦接头中，PEEK复合材料的耐磨性可提高至七倍，而在陶瓷-聚合物摩擦接头中可降低16倍。结果表明，通过选择PEEK基体中纤维状填料（碳纳米/微米/毫米纤维）的类型和重量分数，可以有目的地提高摩擦性能和机械性能。这使得扩大机械工程和医学摩擦接头的应用领域和产品范围成为可能，包括使用添加剂技术形成的摩擦接头。