含Ce(SO_4)_2电解液体系中所形成AZ91D微弧氧化膜层的表征  

CHARACTERIZATION OF MICROARC OXIDATION FILMS FORMED ON AZ91D ALLOY IN THE ELECTROLYTE CONTAINING Ce(SO_4)_2

作　　者：王欢[1] 刘向东[1] 张雅萍[1] 乌迪[1] 陈伟东[1] 李元涛[1] 

机构地区：[1]内蒙古工业大学材料科学与工程学院,呼和浩特010051

出　　处：《陶瓷学报》2010年第1期37-41,共5页Journal of Ceramics

基　　金：内蒙古自治区人才开发基金项目(编号:200805)

摘　　要：在微弧氧化过程中,电解液的组成对氧化膜层的形成具有重要作用。本文研究了Na2SiO3电解液体系中,Ce(SO4)2的含量对AZ91D微弧氧化膜层特性的影响。测定了氧化膜层的厚度,并用XRD、SEM对氧化膜进行了相组成及表面形貌的分析。结果表明:Ce(SO4)2在0.10～0.30g/L范围内逐渐增加时,陶瓷层的厚度呈现出先增大后减小的趋势,随着Ce(SO4)2含量的增加,氧化膜层表面孔洞直径减小,且裂纹明显减少,氧化膜层较为平整、均匀。XRD分析结果显示,氧化膜层主要由立方结构MgO和镁橄榄石相Mg2SiO4构成。The compositions of electrolyte play an important role in the formation of films in microarc oxidation process. The effect of the content of Ce（SO4）2 in Na2SiO3 electrolyte on the characteristics of microaro oxidation films on AZ91D alloy was investigated in this study. The thickness of films was measured. The compositions of phase and the microstructures of the ceramic coatings were analyzed by XRD and SEM. The results show that the thickness of the ceramic coatings increases at first, but afterwards reduces with the increase of the content of Ce（SO4）2 from 0.1 to 0.3 g/L. The diameter of pores and microcracks on the surface of ceramic coatings reduces with the increasing of the content of Ce（SO4）2. The ceramic coatings are smooth and uniform and are composed of MgO and Mg2iO4.

关 键 词：AZ91D 微弧氧化 电解液 Ce(SO4)2 陶瓷层 

分 类 号：TQ174.75[化学工程—陶瓷工业]