内氧化法制备Al_2O_3/Cu复合材料电滑动磨损性能的研究  

Electrical Sliding Wear Behavior of Al_2O_3/Cu Composite Prepared by Internal Oxidation

作　　者：徐晓峰[1] 宋克兴[1] 刘瑞华[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471003

出　　处：《摩擦学学报》2008年第1期83-87,共5页Tribology

基　　金：河南省高校杰出科研人才创新工程项目资助(2007KYCX008);国家自然科学基金资助项目(50432020);河南省高等学校青年骨干教师计划项目资助;河南省教育厅科技攻关项目资助(2007430004);河南科技大学重大科技前期预研专项基金资助(2005ZD003);河南科技大学人才科研基金资助(of023);河南省基础与前沿项目资助(072300440110)

摘　　要：采用内氧化法制备Al2O3/Cu复合材料,在自制电磨损试验机上评价Al2O3/Cu复合材料的磨损性能,采用扫描电子显微镜观察Al2O3/Cu复合材料的磨损表面形貌,用能谱仪对其磨损表面主要元素进行分析并探讨其磨损机制.结果表明:在相同试验条件下,Al2O3/Cu复合材料的磨损性能明显优于Cu-0.36Cr-0.06Zr合金,Cu-0.36Cr-0.06Zr合金的磨损率较0.40%Al2O3/Cu复合材料的磨损率高1倍多;在无加载电流条件下,Al2O3/Cu复合材料的磨损机制为粘着磨损和磨粒磨损;在载流条件下其磨损机制主要以粘着磨损为主,并随着电流强度的增加,粘着磨损程度加重,Al2O3/Cu复合材料表面的粘着物主要来自于铜基粉末冶金滑块;Cu-Cr-Zr合金在无加载电流条件下的磨损机制主要为粘着磨损和磨粒磨损,在载流条件下主要为粘着磨损、磨粒磨损及电烧蚀磨损.Using self-made electric-tribo tester, electric-tribological behaviors of Al2O3/Cu composites by internal oxidation were investigated. The wear resistance of Al2O3/Cu composite was greatly superior to that of the commercial Cu-0.36Cr-0.06Zr alloy, the wear resistance of typical Al2O3/Cu composite with 0.4 wt% of A1203 was about 2 time better than that of Cu-0.36Cr-0.06Zr alloy. SEM and EDS analysis indicated that the wear machanism of the composites was adhesive wear with existance of current, while it was abrasive and adhesive wear with no-current. The increasement of current accelerated the adhasive wear.

关 键 词：AL2O3/CU复合材料 内氧化 电滑动磨损性能 磨损机制 

分 类 号：TH117.3[机械工程—机械设计及理论]