Impact of reinforcing fillers' properties on transfer film structure and tribological performance of POM-based materials. (May 2017)

• Record Type: Journal Article
• Authors: Zhang, Ligang; Qi, Huimin; Li, Guitao; Zhang, Ga; Wang, Tingmei; Wang, Qihua
• Is Part Of: Tribology international. Volume 109(2017)
• Page Start: 58
• Page End: 68
• Publication Date: 2017-05
• Subjects: Reinforcements -- POM -- Transfer film -- Tribology; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2016.12.005
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: Series of polyoxymethylene (POM) composites filled with three kinds of micro-sized reinforcing fillers, i.e. short carbon fibers (SCF), aramid particles (AP) and short glass fibers (SGF), with addition of polytetrafluoroethylene (PTFE) and/or silica nanoparticles were prepared. The tribological properties and transfer film structures were comprehensively investigated. It was revealed that mechanical properties of the micro-sized reinforcing fillers influenced significantly the tribological mechanisms of PTFE and silica nanoparticles in POM hybrid composites in aspect of transfer film formation. In comparison to SCF and SGF, AP played a better synergetic role with PTFE and SiO2 nanoparticles in enhancing the tribological performance. It is assumed that tribo-physical and -chemical actions occurring on the reinforcements' asperities are important for tribological behaviors of the composites. Highlights: Reinforcements' properties exert an important influence on tribological performance of POM. Obvious synergy of aramid particles with SiO2 nanoparticles and with PTFE was identified. Tribological properties are closely related to the structures of transfer films. Reinforcements' properties play an important role in formation of transfer film.