Distinct tribological mechanisms of various oxide nanoparticles added in PEEK composite reinforced with carbon fibers. (June 2017)

• Record Type: Journal Article
• Authors: Guo, Lihe; Qi, Huimin; Zhang, Ga; Wang, Tingmei; Wang, Qihua
• Is Part Of: Composites. Volume 97(2017)
• Page Start: 19
• Page End: 30
• Publication Date: 2017-06
• Subjects: PEEK composite -- Oxide nanoparticles -- Hardness -- Tribofilm; Composite materials -- Periodicals; Manufacturing processes -- Periodicals; Composite materials; Manufacturing processes; Periodicals; 620.11805
• DOI: 10.1016/j.compositesa.2017.03.003
• Languages: English
• ISSNs: 1359-835X

Abstract

Abstract: The tribological behaviors of various oxide nanoparticles, i.e. Bi2 O3, CuO, SiO2 and ZrO2, added into a carbon fibers reinforced polyether-ether-ketone were comprehensively investigated. It was demonstrated that nanoparticle types played an important role in the tribological performance. When sliding took place at a low FV (load × speed) condition, the addition of CuO and ZrO2 nanoparticles led to the formation of patch-like tribofilms increasing friction and wear. However, at FV factors ranging from 30 to 300 N m/s, the hard nanoparticles, i.e. SiO2 and ZrO2, resulted in dramatic improvement of the tribological properties. Moreover, nano-ZrO2 was significantly more effective than nano-SiO2 for enhancing the tribological performance. Hard nanoparticles released onto the sliding interface removed the tribo-oxidation layer on steel counterface. Hereafter, they were "tribo-sintered" into an oxide-based tribofilm having a high load-carrying capability. However, the soft nanoparticles, i.e. Bi2 O3 and CuO, did not help to form a robust and lubricating tribofilm.