Friction property evaluation of the whole surface of long fiber reinforced woven composites

Abstract

Multi-scale measurement and evaluation of long fiber reinforced woven composites (LFRWCs) is to accurately establish the bridge between surface processing, topography and material utilization property. This paper mainly focuses on the evaluation of friction and wear property of the whole surface of an LFRWC. The friction performance of one type of LFRWC, namely carbon fiber reinforced silicon carbide composite (C/SiC) pin, rubbing with ZrO 2 disc is researched under two situations: the first is the processing angle of C/SiC is changed and the processing parameters are constant; the second is the processing angle is constant but the surface is polished by different sandpaper grits. The purpose is to find the main factors to evaluate the friction performance of an LFRWC. The results show that the surface microstructure of the cell body from a qualitative perspective combining the action of the area ratios of different fiber bundles from a quantitative perspective in the first situation, and surface topography parameters in the second situation are the primary influence factors. Contacting interface scale is the dominating mechanism. This research is a fundament for the precise evaluation and prediction of the friction performance of an LFRWC.

Effects of the surface processing on the tribological performance of C/SiCs under dry friction

“…It could be found that the surface of C/SiC changed significantly when ground with sandpapers of different sizes. The surface morphologies of C/SiCs surfaces of different sandpaper sizes are studied in our previous study and polishing scratches could be found on pin surface 34 . However, after the tribology test, the pin surface became ultra-smooth, which could be attributed to wear and filling of wear debris.…”