不同纤维含量的炭/炭复合材料制动时的温度场  

Temperature field of C/C composites with different fiber contents during braking

作　　者：梁月明[1] 徐惠娟[1] 易茂中[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2009年第4期225-230,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：国家重点基础研究发展规划(973计划)资助项目(2006CN600906)

摘　　要：研究纤维含量(体积分数)分别为23%、26%、29%的炭/炭复合材料的摩擦磨损性能,采用有限元软件ANSYS计算3种试样在飞机正常刹车条件下的瞬态温度场分布。结果表明:纤维含量为23%和29%的试样摩擦因数较小,平均质量磨损较大;纤维含量为26%的摩擦因数较大,但线型较好,且质量磨损较小。随着纤维含量增加,摩擦表面的最高温度逐渐降低,分别为679℃、586℃、567℃,温度梯度逐渐减小。综合分析材料的摩擦磨损特性和温度场分布可知,纤维含量为26%的炭/炭复合材料摩擦磨损特性最佳,摩擦表面的温度低,最适宜作为飞机刹车材料。The friction and wear properties of C/C composites with different fiber contents（23%, 26%, 29%）were studied, and the transient temperature fields of samples at normal landing energy were calculated by ANSYS. The results show that the friction coefficient of samples with 23% and 29% fiber contents is lower, while the average mass loss is higher. However, the sample with 26% fiber content has a higher friction coefficient, better linetype and less mass loss. The higher the fiber contents, the lower the maximal temperature of friction surface and the temperature gradient. The maximal temperatures of three samples are 678.9℃, 586℃ and 567.2 ℃ respectively. By analyzing the tribological properties and the temperature fields, it is known that the wear mass loss and the surface temperature of the sample with 26% fiber content are the lowest, so it is regarded to be suitable for using as the braking material of airplane.

关 键 词：C/C复合材料:摩擦磨损 温度场 有限元 

分 类 号：TB332[一般工业技术—材料科学与工程]