氧化铝纤维对纸基摩擦材料摩擦学性能的影响

Effects of alumina fiber on the tribological property of composite paper-based friction material

采用湿法成型工艺制备未添加氧化铝纤维和添加氧化铝纤维的两种复合纸基摩擦材料.借助材料表面性能综合测试仪和热重分析仪对制备的纸基摩擦材料的摩擦磨损性能和耐热性能进行检测和研究,采用扫描电镜对磨损表面进行观察分析,从而探究两种纸基摩擦材料在相同的载荷和同一转速下的摩擦磨损性能和耐热性能.结果表明:氧化铝纤维的添加对材料及摩擦磨损性能和耐热性能有显著影响.摩擦前期,材料的动摩擦系数波动性较大,摩擦后期,材料的动摩擦系数波动曲线呈平稳状态,且氧化铝纤维的添加增加了纸基摩擦材料运行的平稳性,降低了磨损率,并提高了纸基摩擦材料的耐热性能.

A novel paper-based friction material via wet-forming skills with the addition of alumina fibers was fabricated.The tribology and wear properties and the thermostability were investigated with the help of CFT-I multi-functional material surface performance tester and the thermogravimetric analyzer(TGA)under the same load and speed.Scanning electron microscopy(SEM)was also used to observe and analyze the worn surface.The results showed that the addition of alumina fibers had obvious effects on tribological properties and the thermostability.In the early stage of friction,the dynamic friction coefficient of materials was volatile and in the late stage,the wave curve of dynamic friction coefficient was in steady state.Moreover the addition of alumina fibers increased the stationarity of paper-based friction materials and reduced the wear rate.Meanwhile,the excellent heat stability of alumina fibers improved the heat resistance of paper-based friction materials.