摘要
对具有粗糙层热解炭结构的针刺毡C/C复合材料在MM 1000型摩擦试验机上模拟某飞机正常着陆、超载着陆和中止起飞3种不同的能载水平进行摩擦磨损性能试验,并对磨损表面和磨屑进行扫描电镜观察.结果表明:C/C复合材料在不同能载水平下均具有高达0.31～0.32的摩擦因数,刹车力矩曲线均较平稳,磨损随能载水平的增加而增大;样件的磨损表面在正常着陆条件下形成较光滑、完整、连续的磨屑层,随着能载水平的增加,形成粗糙的磨屑层,在极高的能载水平(中止起飞条件)下又形成光滑的磨屑层;而样件的磨屑尺寸随能载水平的增加而急剧减小.表明该C/C复合材料具有极好的摩擦制动性能,尤其是在大能载水平下,摩擦性能更加优良,适用作飞机刹车材料.
The friction and wear behavior of C/C composite for needled felt with rough laminar(RL)pyrocarbon structure was investigated on a MM1000 test rig in simulating airplane normal landing , overload landing and rejected takeoff(RTO)conditions. The worn surfaces and debris of the specimens were observed with a scanning electron microscope. The results show this C/C composite has high friction coefficients between 0.31～0.32 and stable brake torque curve in different energy conditions. Wear of specimen increases with the increase of energy condition. In normal landing condition, the worn surface forms smooth, complete and continuous friction film. The worn surface forms rough debris layer with the increase of energy condition. In extremely high energy condition (RTO condition), the worn surface forms smooth and continuous friction film. It is shown that the debris dimension of specimen reduces remarkably with increasing energy. This kind of C/C composite has better friction properties, especially excellent high energy friction performance, which is a better candidate as airplane brake materials.
出处
《中南工业大学学报》
CSCD
北大核心
2003年第3期221-224,共4页
Journal of Central South University of Technology(Natural Science)
基金
国家重点工业试验项目(计高技[1998] 1817)
