摘要
水润滑条件下，在M2000型摩擦试验机上测试了3种具有不同基体炭结构的C／C复合材料（C／C）的摩擦行为。结果表明：随载荷增加，3种材料的摩擦因数均先增后降。其中，完全化学气相渗透工艺（CVI）制备的A材料摩擦因数波动幅度最大，在0．04～0．09之间波动；完全树脂浸渍炭化工艺（RI）制备的B材料和CVI＋RI工艺制备的C材料摩擦因数波动幅度小，在0．05～0．063之间波动。3种材料的体积磨损均随载荷增加而增加，其中C材料的磨损最小，在1．7～4．5mm^3之间波动。随时间延长，3种材料的摩擦因数基本保持稳定。SEM观察表明：随载荷增加，材料磨损表面膜逐渐完整。在B材料磨损表面，临近纤维的树脂炭呈环状磨损形貌；在C材料磨损表面，热解炭磨屑呈片状形貌，轴向垂直滑动方向的纤维呈螺旋状断裂形貌。
The friction and wear behavior of three kinds of C/C composites （C/C） with different matrix carbon was tested with water lubrication using M2000 wear tester. The results show that with the increase in load, the friction coefficient of the three C/C increases at first and then decreases. The friction coefficient of composite A densified by chemical vapor infiltration （CVI） has the highest changed extent among the three composites that is among 0. 04 - 0. 09, but those of composite B densified by resin impregnation（RI） or composite C densified by CVI ＋ RI only change among 0. 05 - 0. 063. The wear volume loss of the three C/C increases with the increase in load, composite C has the lowest wear volume loss that is among 1.7 - 4. 5 mm^3. With the increase in time, the friction coefficients of all samples remain stable. The SEM images show that the worn surface of all samples becomes more and more integrated with the increase in load. On the worn surface of composite B, the resin carbon near the fiber has the ring shape worn morphology;the pyrocarbon debris of composite C has the sheet shape worn morphology. The fiber with the axis perpendicular to the sliding direction has the helical crack morphology.
出处
《润滑与密封》
CAS
CSCD
北大核心
2007年第3期9-11,34,共4页
Lubrication Engineering
基金
国家重点基础研究发展规划资助项目(973)(2006CB600906)
关键词
C/C复合材料
水润滑
摩擦磨损
C/C composites
water lubrication
friction and wear
