制备工艺对Al_2O_3/Cu复合材料载流摩擦磨损性能的影响  

Effect of preparation technology on electrical wear performance of Al_2O_3/Cu composites

作　　者：国秀花[1,2,3] 宋克兴[2,3] 梁淑华[1] 赵培峰[2,3] 张永振[2] 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048 [2]河南科技大学材料科学与工程学院,河南洛阳471000 [3]河南省有色金属材料科学与加工技术重点实验室,河南洛阳471000

出　　处：《材料热处理学报》2014年第3期1-7,共7页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金资助项目(51075122);国家自然科学基金重点项目(U1034002);河南省杰出人才项目(134200510011);广东省教育部产学研结合项目(2012B091100038)

摘　　要：以Al2O3颗粒为增强相,分别采用内氧化法和粉末冶金法制备了Al2O3/Cu复合材料,并在HST100型载流高速试验机上进行了载流摩擦磨损性能测试,研究了制备工艺对Al2O3/Cu复合材料载流摩擦性能的影响。结果表明,内氧化法制备的A12O3/Cu复合材料的导电率和硬度均高于粉末冶金法制备的A12O3/Cu复合材料,且内氧化法比粉末冶金法制备的Al2O3/Cu复合材料具有更低的磨损率和摩擦系数。微观组织观察表明,内氧化法制备的Al2O3/Cu复合材料内部Al2O3颗粒分布均匀,且Al2O3颗粒与铜基体的界面结合整齐致密无污染,这是内氧化法比粉末冶金法制备的Al2O3/Cu复合材料具有更优抗载流摩擦磨损性能的主要原因。With Al2O3 particles as reinforcements, Al2O3/Cu composites with different volume fractions of ot-Al203 particles were fabricated by internal oxidation and powder metallurgy respectively. Electrical sliding wear tests were performed to examine the wear properties of Al2O3/Cu composites on a self-made pin-on-disk electrical wear tester. The effects of preparation technology on electrical wear performance of Al2O3/Cu composites were studied. The results show that electrical conductivity and hardness of Al2O3/Cu composite fabricated by internal oxidation are higher than that of fabricated by powder metallurgy method. The electrical wear properties of Al2O3/Cu composites are consistent with the mechanical properties of Al2O3/Cu composite. Microstrncture observation shows that the interfaces between Al2O3particles and copper matrix within Al2O3/Cu composites fabricated by internal oxidation are more neat and compact than that in Al2O3/Cu composite materials fabricated by powder metallurgy, which is the main cause of better electrical wear resistance of Al2O3/Cu composite fabricated by internal oxidation.

关 键 词：AL2O3 CU复合材料 制备工艺 电接触 摩擦 

分 类 号：TG115.5[金属学及工艺—物理冶金]