电流密度对ZA43微弧氧化膜层摩擦性能的影响  

Effects of current density on tribological behavior of microarc oxidation coating on ZA43 alloy

作　　者：刘忠德[1] 张迎涛[1] 罗锐[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《轻金属》2013年第4期60-63,共4页Light Metals

摘　　要：利用微弧氧化技术在ZA43合金表面原位生成了陶瓷层,通过SEM、XRD和摩擦磨损试验机分析了不同电流密度处理膜层的表面形貌、相组成以及磨损试验后的摩擦学行为和磨痕形貌。结果表明,陶瓷层主要由α-Al2O3和γ-Al2O3相组成;在干摩擦条件下,陶瓷层摩擦系数随电流密度的增加逐渐增大,表明陶瓷层耐磨性随电流密度的增加而降低;电流密度一定时,摩擦系数随载荷的提升而增大。磨损机制以磨粒磨损为主。Situ ceramic coatings were fabricated on ZA43 alloy by micro-arc oxidation. The surface morphology, phase composition,tribological behavior and abrasive morphology of micro - arc oxidation ceramic coatings formed in different current density were investigated by electron microscopy（ SEM）, X - ray diffraction（XRD） and friction and wear tests respectively. The tested results indicate that the ceramic coatings are made up of a mixture of α -alumina and T - alumina, under a dry sliding wear condition, the friction coefficient of wear scar increases with current density which indicates that the wearing re-sistance of ceramic coating decreases with current density. Friction coefficient increases with load under a constant current density. The main erosion mech- anisms were nroved to be mainly grain wear.

关 键 词：ZA43合金 电流密度 微弧氧化 摩擦性能 

分 类 号：TG115.58[金属学及工艺—物理冶金]