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炭纤维增强铜基复合材料摩擦磨损性能同其磨损表面形貌相关性研究
引用本文:车建明.炭纤维增强铜基复合材料摩擦磨损性能同其磨损表面形貌相关性研究[J].摩擦学学报,2004,24(2):144-147.
作者姓名:车建明
作者单位:天津大学,机械工程学院,天津,300072
摘    要:考察了炭纤维增强铜基复合材料的摩擦磨损性能,利用扫描电子显微镜、电子探针X射线显微分析仪和表面轮廓测试仪等观察分析了复合材料磨损表面形貌和元素组成.结果表明,复合材料摩擦磨损性能及其磨损表面形貌与粗糙度同载荷及滑动速度密切相关,当载荷和速度小于某一临界值时,复合材料同钢对摩时的摩擦系数和磨损率均较小,而当载荷和速度超过临界值时,复合材料的摩擦系数和磨损率均大幅增大,复合材料磨损表面形成了由C、Cu和Fe等元素组成的固体润滑和防护薄膜,使得其在干摩擦条件下同钢对摩时的摩擦系数和磨损率均较低.

关 键 词:炭纤维  铜基复合材料  摩擦学性能  磨损表面特征
文章编号:1004-0595(2004)02-0144-04
修稿时间:2003年6月2日

Correlation between the Tribological Behavior of Carbon Fiber Reinforced Copper Matrix Composite and Its Worn Surface Feature
CHE Jian-ming.Correlation between the Tribological Behavior of Carbon Fiber Reinforced Copper Matrix Composite and Its Worn Surface Feature[J].Tribology,2004,24(2):144-147.
Authors:CHE Jian-ming
Abstract:An MM-200 test rig was performed to evaluate the friction and wear behavior of carbon fiber reinforced copper matrix composite sliding against AISI-1045 steel in a block-on-ring configuration. The morphologies and elemental compositions of the worn composite surfaces at different testing conditions were analyzed by means of scanning electron microscopy and energy dispersive spectrometry, while the worn surface roughness of the composite was determined on a profilometer. It was found that the carbon fiber reinforced Cu-based composite showed good friction-reducing and antiwear behavior in dry sliding against the steel ring, which was attributed to the self-lubricating ability and load-supporting effect of the reinforcing agent. The friction and wear behavior of the Cu-based composite was dependent on the friction and wear test conditions and the worn surface morphologies as well. It had a smaller wear rate at a relatively small sliding velocity, which corresponded to the polishing of the worn composite surface and mild plastic deformation; while a largely increased wear rate was recorded at an increased normal load, which corresponded to a rougher worn composite surface, owing to the enhanced plastic deformation and wear debris aggregation therewith. Since the carbon fiber reinforced Cu-based composite was liable to severe plastic deformation as it slid against the steel at a larger normal load or sliding velocity, it was suggested to use the composite as a kind of self-lubricating material at a normal load below 40 N.
Keywords:carbon fiber  Cu-based composite  tribological behavior  worn surface feature
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