Significance of combined functional nanoparticles for enhancing tribological performance of PEEK reinforced with carbon fibers. (November 2017)

• Record Type: Journal Article
• Authors: Guo, Lihe; Zhang, Ga; Wang, Daoai; Zhao, Fuyan; Wang, Tingmei; Wang, Qihua
• Is Part Of: Composites. Volume 102(2017)
• Page Start: 400
• Page End: 413
• Publication Date: 2017-11
• Subjects: PEEK composites -- Tribo-film -- Hybrid nanoparticles -- Lubricity; Composite materials -- Periodicals; Manufacturing processes -- Periodicals; Composite materials; Manufacturing processes; Periodicals; 620.11805
• DOI: 10.1016/j.compositesa.2017.09.002
• Languages: English
• ISSNs: 1359-835X

Abstract

Graphical abstract: Highlights: Hybrid soft-hard nanoparticles added into SCF-reinforced PEEK significantly shortened the running-induration and improved its tribological performance. Robust and slippery tribo-films consisting of hybrid functional nanoparticles were generated. Physical and chemical actions the sliding interface can be tuned by filling hybrid nanoparticles with distinct functionalities. This work can pave a route for developing new self-lubrication composites subjected to extreme running conditions. Abstract: Tailoring a robust and slippery tribo-film on polymer-metal interface is a potential approach for improving the tribological performance. In this work, hybrid soft-hard nanoparticles were compounded into polyetheretherketone (PEEK) reinforced with carbon fibers. Effects of nanoparticle combinations on tribological performance of the composites and tribo-film's functionality were explored. It was demonstrated that hybrid oxide nanoparticles, i.e. Bi2 O3 -SiO2 and CuO-SiO2, accelerated formation speed of tribo-films. The soft nanoparticles, i.e. Bi2 O3 and CuO, having low-melting points expedited tribo-sintering of wear products on the interface. Moreover, combination of WS2 -SiC nanoparticles resulted in a "slippery" tribo-film withstanding harsh rubbing conditions. Hard species endowed the tribo-film a high load-carrying capability, while the soft ones imparted the tribo-film an easy-to-shear characteristic. Striking stretching and re-orientation of PEEK molecules in tribo-film were identified and corroborated the "slippery" characteristic. It is expected that this work can pave a route for developing new self-lubrication composites under extreme running conditions.