不同能载水平下C/C复合材料的摩擦特性

来源期刊：中南大学学报(自然科学版)2003年第3期

论文作者：徐惠娟 熊翔 黄伯云 彭剑昕 李江鸿

文章页码：221 - 224

关键词：C/C复合材料;能载;摩擦特性

Key words：C/C composite; energy; friction property

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.

Abstract: The friction and wear behavior of C/C composite for needled felt with rough laminar(RL)pyrocarbon structure was investigated on a MM-1000 test rig in simulating airplane normal landing , overload landing and rejected take-off(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 debrisdimension 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.

基金信息：国家重点工业试验性项目