基体碳结构对轴间密封环用C/C复合材料摩擦磨损特性的影响  

Influence of Carbon Matrix on the Tribology of C/C Composites Used as Shaft Sealing Ring

作　　者：葛毅成[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,湖南长沙410083

出　　处：《航空学报》2004年第6期619-624,共6页Acta Aeronautica et Astronautica Sinica

基　　金：教育部骨干教师基金(教技司[2000]143号)资助项目

摘　　要：在M2000型摩擦实验机上,在不同载荷作用下,对4种具有不同偏光结构的C/C复合材料与40Cr钢配副进行环—块滑动摩擦实验。结果表明:相同载荷下,具有粗糙层(RL)基体碳结构试样的摩擦系数都最高,且随载荷的增加在0 151～0 165之间波动。而光滑层(SL)碳结构的试样的摩擦系数最低,随载荷增加在0 105～0 117之间缓慢降低。随时间延长,RL结构的试样在高载荷下摩擦系数下降,SL结构的试样摩擦系数除60N外略有上升,树脂碳增密的试样摩擦系数均下降,而树脂碳+SL碳的试样仅80N、150N的基本保持不变。RL结构的试样体积磨损量最大,最大值为150N时的1 61mm3,而SL+树脂碳结构的试样体积磨损量最小,在0 391～0 420mm3之间。SEM观察表明:随载荷增加,RL结构的试样摩擦表面形貌仍很完整、光滑,而浸渍增密的试样纤维拔出现象加剧,SL+树脂碳结构的试样摩擦表面逐渐完整。On M2000 wear machine, coupled with 40Cr steel, four kinds of C/C composites with different carbon matrix structures have been tested under different loadings for friction and wear characteristics. The results show: the RL (rough layer) structure sample gets the highest friction coefficient 0.151-0.165 and fluctuating with loading increase; and the SL (smooth layer) structure sample gets the lowest friction coefficient 0.105-0.118 and decreasing slowly with the increase of loading. With time prolonging, the friction coefficient of RL structure sample decreases under high loading, while that of SL structure sample increases a little except under 60 N. Under all the loadings, the friction coefficient of resin carbon densified sample decreases with time prolonging, but that of SL + resin carbon structure sample shows the variety trend being different under different loadings. The bulk wear loss of RL structure sample is the highest which could reach 1.61 mm3 under 150 N, and that of SL + resin carbon structure sample is the least. The SEM observation shows that with loading increase, the wear surface of RL sample changs only a little, while the resin carbon sample exhibits more and more severe surface fiber drawn phenomenon, and the SL + resin carbon structure sample exhibits more and more smooth wear surface.

关 键 词：C/C复合材料 基体碳 摩擦 磨损 

分 类 号：TB332[一般工业技术—材料科学与工程]