电解液组成对ZAlSi12Cu2Mg1微弧氧化陶瓷膜的影响  

Effects of electrolyte constitutes on ceramic coatings of ZAlSi12Cu2Mg1 by micro-arc oxidation

作　　者：刘彩文[1] 刘向东[1] 乌迪[1] 吕凯[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：《中国有色金属学报》2009年第3期459-463,共5页The Chinese Journal of Nonferrous Metals

基　　金：内蒙古科技攻关资助项目(20040202)

摘　　要：采用电解液成分逐渐加入法,在6种电解液中对ZAlSi12Cu2Mg1试样进行微弧氧化处理,研究电解液组成对微弧氧化陶瓷膜形成的影响,寻找合适的电解液组成。结果表明:电解液组成对陶瓷膜层的厚度、粗糙度、硬度、耐磨性、膜层微观形貌及相组成的影响很大,通过调节电解液成分,可获得性能优良的陶瓷膜。适宜的电解液组成为:8g/LNaSiO3,1g/LNaOH,2g/LNa2WO4,0.5g/LNa2EDTA及10mL/L丙三醇。在此种电解液组成下,获得的陶瓷膜厚156μm,面粗糙度为259nm,显微硬度达HV891。在干摩擦条件下,经30min磨损后,其磨损仅为基体的13.29%。观察膜层微观形貌,膜层均匀致密。XRD分析表明:氧化层中含有Al、莫来石、SiO2、α-Al2O3、γ-Al2O3和WO3相。ZAlSi12Cu2Mg1 samples were treated by microarc oxidation （MAO） in six different electrolytes. To obtain appropriate electrolyte constitutes, the effects of electrolyte constitutes on ceramic coatings of ZA1Si12Cu2Mg1 MAO were investigated. The results indicate that the electrolyte composition has great influence on thickness, roughness, microhardness, wear resistance, morphology and phase compositions of ceramic coating. The fine ceramic coating is obtained by changing electrolyte. The appropriate electrolyte constitutes are 8 g/L Na2SiO3, 1 g/L NaOH, 2 g/L Na2WO4, 0.5 g/L Na2EDTA and 10 mL/L glycerin. In this electrolyte, it is feasible to obtain a 156μm thick coating, the roughness decreases to 259 nm and the microhardness increases to HV 891. The wear mass loss of coating after 30 rain is only 13.29% of the matrix, which is relative to ZAlSi12Cu2Mg1 under the condition of dry friction. The morphologies of coatings are continuity and density. The XRD analysis indicates that coatings are composed of mullite, SiO2, α-Al2O3, γ-Al2O3 and WO3.

关 键 词：ZALSI12CU2MG1 电解液组成 微弧氧化 陶瓷膜 

分 类 号：TG174.4[金属学及工艺—金属表面处理]