Morphology and Frictional Characteristics Under Electrical Currents of Al_2O_3/Cu Composites Prepared by Internal Oxidation  

内氧化制备A1_2O_3/Cu复合材料载流条件下表面磨损形貌和摩擦学性能研究(英文)

作　　者：刘瑞华[1] 宋克兴[1] 贾淑果[1] 徐晓峰[1] 郜建新[1] 国秀花[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471039

出　　处：《Chinese Journal of Aeronautics》2008年第3期281-288,共8页中国航空学报（英文版）

基　　金：National Natural Science Foundation of China (50432020);Henan Innovation Project for University Prominent Re- search Talents (2007KYCX008);Henan Education Department Science and Technology Project (2007430004);Henan Plan Project for College Youth Backbone Teacher;Henan University of Science and Technology Major Pre-research Foundation (2005ZD003);Henan University of Science and Technology Personnel Scientific Research Foundation (of023)

摘　　要：Two Al2O3/Cu composites containing 0.24 wt.% Al2O3 and 0.60 wt.% Al2O3 separately are prepared by internal oxidation. Effects of sliding speed and pressure on the frictional characteristics of the composites and copper against brass are investigated and compared. The changes in morphology of the sliding surface and subsurface are examined with scanning electron microscope （SEM） and energy dispersive X-ray spectrum （EDS）. The results show that the wear resistance of the Al2O3/Cu composites is superior to that of copper under the same conditions, Under a given electrical current, the wear rate of Al2O3/Cu composites decreases as the Al2O3-content increases, However, the wear rates of the Al2O3/Cu composites and copper increase as the sliding speed and pressure increase under dry sliding condition. The main wear mechanisms for Al2O3/Cu composites are of abrasion and adhesion; for copper, it is adhesion, although wear by oxidation and electrical erosion can also be observed as the speed and pressure rise.Two Al2O3/Cu composites containing 0.24 wt.% Al2O3 and 0.60 wt.% Al2O3 separately are prepared by internal oxidation. Effects of sliding speed and pressure on the frictional characteristics of the composites and copper against brass are investigated and compared. The changes in morphology of the sliding surface and subsurface are examined with scanning electron microscope （SEM） and energy dispersive X-ray spectrum （EDS）. The results show that the wear resistance of the Al2O3/Cu composites is superior to that of copper under the same conditions, Under a given electrical current, the wear rate of Al2O3/Cu composites decreases as the Al2O3-content increases, However, the wear rates of the Al2O3/Cu composites and copper increase as the sliding speed and pressure increase under dry sliding condition. The main wear mechanisms for Al2O3/Cu composites are of abrasion and adhesion; for copper, it is adhesion, although wear by oxidation and electrical erosion can also be observed as the speed and pressure rise.

关 键 词：Al2O3/Cu composite internal oxidation friction and wear surface morphology current carder 

分 类 号：TB33[一般工业技术—材料科学与工程]