增强纤维对纸基摩擦材料性能的影响

Effect of Reinforced Fiber on the Performance of Paper-based Friction Material

分别以碳纤维、芳纶纤维和纤维素纤维为增强体,采用湿法工艺制备出3种纸基摩擦材料。借助扫描电镜、热重分析仪和摩擦磨损性能试验机研究不同增强纤维纸基摩擦材料的微观形貌、耐热性能和摩擦磨损性能。结果表明:增强纤维在树脂基体中随机分布,形成大小不一的孔隙;纸基摩擦材料的热失重过程可以分为4个阶段,碳纤维增强纸基摩擦材料的第一阶段失重量仅为1.3%,耐热性能优异;在压力和转速变化条件下,碳纤维增强纸基摩擦材料动摩擦因数的稳定系数分别为91.7%和97.3%,磨损率为2.56×10-5mm3/J,远优于其他2种纤维增强的纸基摩擦材料。

Paper-based friction materials were prepared using paper-making process with carbon fiber, Kevlar fiber and cellulose fiber as reinforcement, respectively. The microstruetures, thermal properties and friction performance were analyzed by SEM, thermal analyzer and friction tester. Experimental results indicate that reinforced fiber is dispersed in resin matrix uniformly, and pores with different size are formed. The paper-based friction materials have four stages of degradation approximately, and the weight-loss of first stage of sample reinforced by carbon fiber is only 1.3%. The stability coefficient of paper-based friction materials reinforced by carbon fiber is 91.7% and 97.3% while changing braking pressure and rotating speed, respectively. The wear rate of paper-based friction materials reinforced by carbon fiber is 2.56×10^-5mm^3/J, better than other paper-based friction materials reinforced by Kevlar fiber and cellulose fiber.