碳/碳化硅复合材料摩擦磨损性能分析  

The Analysis of Friction and Wear Performance of C/C-SiC Composites

作　　者：张亚妮[1] 徐永东[1] 楼建军[1] 张立同[1] 成来飞[1] 陈志军[2] 

机构地区：[1]西北工业大学超高温复合材料实验室凝固技术国家重点实验室,西安710072 [2]华兴航空机轮及刹车系统有限责任公司,陕西兴平713106

出　　处：《航空材料学报》2005年第2期49-54,共6页Journal of Aeronautical Materials

摘　　要：采用化学气相渗透法制备了碳纤维增强碳化硅(C/C SiC)陶瓷基复合材料,得到不同密度和组分含量的C/C SiC刹车盘试样。对C/C SiC复合材料进行了摩擦磨损性能测试,平均摩擦系数达到 0 23,摩擦稳定性达到0 43,线性磨损率为 9 3μm/次·面,质量磨损率为 2 6mg/次·面。当C/C SiC复合材料的密度增大 (1 6g·cm-3→2 2g·cm-3 ),碳含量增大(35%→55% ),摩擦系数和稳定性提高(约 70% ),且摩擦系数随制动次数增加的波动幅度减小;SiC含量升高则反之。C/C SiC复合材料经过多次刹停测试,摩擦系数对制动次数不敏感,表现出良好的摩擦稳定性。经过连续刹车试验,摩擦系数不随表面的起始和最终温度升高而衰退,材料尚无热衰竭趋势。对C/C SiC刹车盘试样的磨损表面形貌及缺陷进行了观察,发现表面磨损质量在航标允许范围内。The carbon/silicon carbide composites (C/C-SiC) were prepared by chemical vapor infiltration (CVI) method, and the braking disks with different density and component content were finally obtained. The friction and wear performance of the C/C-SiC composites were investigated. It was obtained that, the coefficient of friction was 0.23, the friction stability was 0.43, the liner wear rate was 9.3μm·cycle^(-1), and the weight wear rate was 2.6 mg·cycle^(-1).The friction coefficient and stability were significantly improved by about 70% and the fluctuation range of friction coefficient decreased with increasing the material density from 1.6g/cm^3 to (2.2 g/cm^3) and increasing the carbon content from 35% to 55%, by contrast, the result was opposite with increasing SiC content. The C/C-SiC composites were not sensitive to the braking number, which demonstrated a good stability of friction. The continuous braking test of C/C-SiC disks suggested nearly constant curves of the coefficient of friction, which demonstrated the good stability of this friction material against fading. The wear quality of friction surfaces for C/C-SiC disks was analyzed finally, and the result indicated that the wear quality was in the range of the aviation standard.

关 键 词：C/C-SIC复合材料 陶瓷基复合材料 碳化硅 摩擦磨损性能 化学气相渗透法 摩擦系数 刹车盘 表面磨损 碳纤维增强 试样 

分 类 号：V257[一般工业技术—材料科学与工程] TB332[航空宇航科学与技术—航空宇航制造工程]