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Influences of Matrix Morphology and Graphite Fillers on Tribological Behavior of Carbon-Fiber Reinforced PTFE/PPS Composites

JONATHAN PENARANDA, SHUREN QU, SU SU WANG

Abstract


A study was conducted on tribological behavior of carbon-fiber reinforced PTFE/PPS composites with different matrix morphologies and graphite flakes. The PPS matrix morphology was controlled by sintering parameters. The morphology of the composite was characterized X-Ray diffractometry (XRD), optical macroscopy and DSC. The composite mechanical properties were determined by hardness, compressive tests and DMA. The tribological behavior was studied with a precision pin-on-disk tester. The results show that the PPS matrix can be modified to a semicrystalline or a fully amorphous PPS matrix. The matrix morphology had a significant influence on mechanical properties of the composite, consequently its friction and wear behavior. The graphite flakes reduced the composite coefficient of friction but had a substantial, negative impact on the composite compressive failure strain. The amorphous PPS matrix, however, had a low friction coefficient and also reduced the specific wear rate of the composite.


DOI
10.12783/asc2017/15387

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