碳纤维/环氧树脂复合材料摩擦性能研究

Research on Tribological Properties of Carbon Fiber Reinforced Epoxy Resin Composites

采用液相氧化法合成氧化碳纤维,制备碳纤维/环氧树脂复合材料,研究了复合材料的力学性能和摩擦性能。结果表明,碳纤维经液相氧化后,复合材料的力学强度有所降低,但模量均有明显提高;碳纤维和氧化碳纤维能改善环氧树脂复合材料的摩擦性能,降低摩擦系数和减少磨损率,提高复合材料的耐磨性;复合材料的摩擦系数和磨损率均随着载荷和时间的增加而增大。由材料磨损表面的扫描电镜可知碳纤维/环氧树脂复合材料以磨粒磨损与粘着磨损为主,氧化碳纤维/环氧树脂复合材料以疲劳磨损和磨粒磨损为主。碳纤维和氧化碳纤维可以作为环氧基摩擦材料的增强材料,这一研究对于拓宽摩擦材料领域的研究发展具有重要意义和促进作用。

Carbon dioxide fiber synthesized by liquid-phase oxidation method was used to prepared carbon fiber/epoxy resin composites.The mechanical properties and tribological performance of the composites were studied.The experimental results show that the strength of the composites decreases after the liquid phase oxidation,but the modulus increases obviously.The carbon fiber and the oxidized carbon fiber could remarkably reduce the friction coefficient and reduce the wear rate of the epoxy resin composites.The friction coefficient and wear rate of the composites increases with the increasing of load and time.SEM images of the worn surface show that the wear mechanism of carbon fiber/epoxy composite is abrasive wear and adhesive wear.The wear mechanism of oxidized carbon fiber/epoxy composite is mainly fatigue wear and abrasive wear.The obtained results indicate that carbon fiber and carbon dioxide fiber can be used as reinforcements for epoxy-based friction materials,this research is of great significance to promote the research and development of friction materials.