【摘要】 为探明树脂炭含量与C/C复合材料摩擦因数及磨损量的关系,研究树脂炭含量分别为0、8.6%、67%(质量分数)的3种C/C复合材料的精细结构和摩擦磨损性能,采用实验用飞机制动装置模拟不同速度下的刹车过程,利用扫描、透射电镜观测分析摩擦表面和磨屑的微观形貌与结构。结果表明:3种材料均具有稳定的摩擦因数,并在中低速条件下达到峰值;随着树脂炭含量的增加,材料的磨损显著增大,树脂碳含量为67%的样件磨损量最大;树脂炭对C/C复合的摩擦因数影响不大。更多还原

【Abstract】 In order to study the influence of resin-derived carbon content on friction performance of C/C composites,three different C/C composites with 0,8.6%,67%(mass fraction) of resin-derived carbon,were tested and evaluated for friction and wear performance.A laboratory dynamometer was used to explore the simulative braking tests under different speed utilizing a single stator and rotor pair of an experimental airplane braking system.The morphology and microstructure of wear surfaces and wear debris at different braking levels were observed with scanning electron microscopy(SEM) and transmission electron microscopy(TEM).The results show that all three samples have nearly constant friction coefficients,which have the highest value under medium braking speed.Wear rate increases greatly with increasing resin-derived carbon content in C/C composites and gets the maximum value at the resin-derived carbon content of 67%.The resin-derived carbon has no significant effect on the friction coefficient.更多还原