不同频率下C/C复合材料的往复式滑动摩擦特性  

Reciprocating frictional properties of C/C composite under different frequencies

作　　者：葛毅成[1] 易茂中[1] 彭可[1] 杨琳[1] 雷宝灵[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：《中国有色金属学报》2011年第12期3108-3114,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2006CB600906);湖南省自然科学基金资助项目(09JJ4027)

摘　　要：制备了两种具有不同基体炭类型的C／C复合材料，测试其与GCr钢在40N时配副时的往复式摩擦行为。结果表明：随滑动频率的增加，两种试样的摩擦因数先增加，均在400r／min时达到最大，之后除在l200r／min时略有反弹外，基本表现出线性下降趋势。在相同频率下，具有光滑层结构热解炭基体材料（SL）的摩擦凶数低于另一种具有粗糙层结构热解炭和树脂炭混合基体（RL／RC）材料的。其中，RL／RC基体材料的摩擦因数在0．183～0．063之间；而SL基体材料的摩擦因数在0．150～0．059之间。随时间的延长，所有试样的摩擦因数均逐渐趋于稳定。Raman检测结果表明，随滑动频率增大，材料摩擦表面的微区石墨化度增加。但SEM形貌表明，随滑动频率增大，材料摩擦表面形貌由光滑变得粗糙，磨粒磨损加剧。The influence of reciprocating frequency on the sliding friction behavior of two kinds of C/C composites against GCr steel ball was investigated on a UMT-3 tester at 40 N. The results show that the coefficient of friction （COF） of the two C/C composites increases firstly with increasing the sliding frequency until it reaches the maximum at 400 r/min, and then the COF shows a similar linear decline except some fluctuation generated under 1 200 r/min. The COF of the composites with rough lamination pyrocarbon/resin carbon matrix （RL/RC） is larger than that of the composites with smooth lamination pyrocarbon （SL） matrix at the same sliding frequency. The COFs of the RL/RC-composites are in the range of 0.183-0.063, while those of the SL-composites are 0.150-0.059. The COFs of all the samples become more and more stable with increasing time. The results of Raman spectrum detection show that the graphitization of micro-worn-area composites with SL increases with increasing the reciprocating frequency. SEM images show that the worn surfaces of the two C/C composites change from smooth surface to rough surface with more plough-worn grooves.

关 键 词：C/C复合材料 往复式摩擦 频率 摩擦特性 

分 类 号：TH145.1[一般工业技术—材料科学与工程]