酚醛树脂基复合材料摩擦性能研究

Study on Tribological Properties of Phenolic Resin-based Composites

采用MPX-2000型销盘式摩擦磨损试验机评价了分别填充氧化铝、Cu粉、石墨、石墨与Cu粉复配的酚醛树脂基复合材料在载荷为100 N、转速为500 r∕min、室温干摩擦条件下的滑动摩擦磨损性能,并分析了磨损后的表面形貌。结果表明,与未填充相比,填充试样的平均摩擦系数和磨损量均有不同程度的降低,其中由石墨、石墨与Cu粉复配填充试样的磨损量显著降低,分别下降80.7%,84.8%。未填充试样磨损表面出现少量被拔出的磨屑纤维,未见明显润滑膜;而填充试样的磨损表面呈现出明显、均匀的润滑膜。填料改变了酚醛树脂基复合材料的磨损机理,增强了复合材料的抗极压承载和促进润滑膜形成能力,提高了复合材料的摩擦磨损性能。

The friction and wear properties of phenolic resin-based composites filled with alumina, Cu powder, graphite or graphite / Cu powder were studied with an MPX-2000 pin-on-disc friction and wear tester under applied load of 100 N, sliding speed of 500 r/min, dry friction condition at the room temperature.The surface morphology of worn composites was analysed.The results show that the average friction coefficient and wear mass loss of the filled samples decrease more or less respectively, compared with those of unfilled one. The wear mass loss of composites filled with graphite and graphite/Cu powder decrease drastically by 80.7% and 84.8% respectively.An amount of drawn debris has appeared on the worn surfaces of the unfilled samples, without obvious lubricating film.But the obvious and uniform lubricating films have presented on the worn surfaces of the filled samples.Fillers have changed wear mechanism of phenolic composites, enhanced composite＇s resistance to extreme pressure bearing and ability to promote lubricant film formation, improved the friction and wear properties of composites.