Combined effects of interface modification and micro-filler reinforcements on the thermal and tribological performances of fabric composites

Autor: Mingming Yang, Wei Jiang, Junya Yuan, Xuehu Men, Weimin Liu, Liangfei Wu, Peilong Li, Zhaozhu Zhang, Xin Zhao
Rok vydání: 2020
Předmět:
Zdroj: Friction. 9:1110-1126
ISSN: 2223-7704
2223-7690
Popis: The high specific-strength of glass fibers and exceptional self-lubrication of polytetrafluoroethylene (PTFE) fibers promote the potential application of hybrid PTFE/glass fabric composites in the tribological field, but their weak interfacial adhesion and inferior thermal properties significantly inhibit their tribological performance and reliability. Herein, a hybrid of polydopamine/silicon carbide/polyethyleneimine (PDA/SiC/PEI) functional coating was co-deposited onto the hybrid PTFE/glass fabric surface through a one-step impregnation method, leading to increased surface roughness and abundant amine groups. Tensile and peeling tests showed that this functional coating offered 47.8% enhancement in the fabric/matrix interfacial adhesion without compromising the strength of the pristine fabric. Moreover, the additional incorporation of WS2, and aluminum nitride (AlN) micro-fillers contributed to the development of a high-quality tribofilm and improved the thermal properties of fabric composites. The results of wear tests proved that the hybrid-fabric composites, after the introduction of functional coating and micro-fillers, exhibited outstanding tribological performance, which was attributed to the superior interfacial adhesion as well as the synergistic enhancement effects between WS2 and AlN micro-fillers.
Databáze: OpenAIRE
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