电流密度对7075铝合金微等离子体氧化陶瓷层特性的影响  

Effects of Current Density on Properties of Micro Plasma Oxidation Ceramic Coatings on 7075 Aluminum Alloy

作　　者：郝康达[1] 陈秋荣[2,3] 苗景国[1,2] 吴润[1] 卫中领[2] 

机构地区：[1]武汉科技大学材料与冶金学院,武汉430081 [2]中国科学院嘉兴轻合金技术工程中心,嘉兴314006 [3]嘉兴中科亚美合金技术有限责任公司,嘉兴314006

出　　处：《表面技术》2012年第5期47-49,共3页Surface Technology

摘　　要：采用微等离子体氧化法在NaAlO2溶液中对7075铝合金进行表面处理,研究了阳极电流密度及阴/阳极电流密度比对陶瓷层的厚度、硬度、表面及截面形貌、相组成等的影响。结果表明:陶瓷层的厚度、显微硬度及微观形貌与阳极电流密度及阴/阳极电流密度比密切相关,在阳极电流密度为10A/dm2及阴/阳极电流密度比为0.7时,陶瓷层显示出较好的表面及截面形貌。Applying the technology of micro plasma oxidation to improve the surface of 7075 aluminum alloy in sodium aluminate solution, effects of anodic current density（Ja） and the ratio of cathodic current density（Jc） to anodic current density on thickness and hardness, surface and cross-section morphology as well as phase composition were stud- ied. The results show that, the thickness and hardness as well as ed to J a and the ratio of Jc/Ja. Better comprehensive property of ratio of Jc/Ja was 0.7. surface and cross-section morphology are closely relat- ceramic coatings is obtained while Ja is 10 A/dm^2 and

关 键 词：微等离子体氧化 电流密度 陶瓷层 特性 

分 类 号：TG174.453[金属学及工艺—金属表面处理]