Sariyev Bakytzhan, Amrin Andas, Mergenbay Aiat, Rao H Jeevan, Khabdulayeva Aigerim, Spitas Christos, Golman Boris
Department of Computational and Data Sciences, Astana IT University, Astana, Kazakhstan.
Nazarbayev University Research Administration, Astana, Kazakhstan.
Sci Rep. 2025 Aug 6;15(1):28724. doi: 10.1038/s41598-025-14776-5.
Poly(ether-ether-ketone) (PEEK) is a high-performance thermoplastic with excellent mechanical strength, thermal stability, and chemical resistance, making it attractive for applications like biomedical implants and prostheses. However, neat PEEK suffers from a high friction coefficient and pronounced wear in sliding contacts. In this work, composites of PEEK with Cobalt-Chromium (CoCr) alloy powder were fabricated by centrifugal powder compaction and vacuum sintering. Four composite compositions, with weight percentages of 10%, 20%, 30%, and 40% of CoCr, were produced. Scanning electron microscopy analysis confirmed uniform dispersion of CoCr particles within the PEEK matrix. Differential scanning calorimetry and thermogravimetric analysis showed that CoCr addition did not significantly alter PEEK's melting temperature or thermal stability. Microhardness increased with filler loading, with the 40% CoCr composite achieving a 40% hardness improvement over neat PEEK. Ball-on-disk tests against steel revealed that all composites exhibited significantly reduced wear loss by 84% compared to neat PEEK, while maintaining a friction coefficient typical for PEEK-steel contacts. Overall, the PEEK/CoCr composites demonstrate enhanced hardness and wear resistance while retaining PEEK's favorable thermal properties, suggesting their potential for applications requiring better tribological performance than unfilled PEEK.
聚醚醚酮（PEEK）是一种高性能热塑性塑料，具有优异的机械强度、热稳定性和耐化学性，这使其在生物医学植入物和假体等应用中具有吸引力。然而，纯PEEK在滑动接触中存在高摩擦系数和明显磨损的问题。在这项工作中，通过离心粉末压实和真空烧结制备了PEEK与钴铬（CoCr）合金粉末的复合材料。制备了四种复合成分，CoCr的重量百分比分别为10%、20%、30%和40%。扫描电子显微镜分析证实CoCr颗粒在PEEK基体中均匀分散。差示扫描量热法和热重分析表明，添加CoCr并没有显著改变PEEK的熔点或热稳定性。显微硬度随填料含量的增加而提高，40%CoCr复合材料的硬度比纯PEEK提高了40%。与钢的球盘试验表明，与纯PEEK相比，所有复合材料的磨损损失均显著降低了84%，同时保持了PEEK与钢接触时典型的摩擦系数。总体而言，PEEK/CoCr复合材料在保持PEEK良好热性能的同时，硬度和耐磨性得到增强，表明它们在需要比未填充PEEK更好摩擦学性能的应用中具有潜力。
