Electrodeposition of quarternary Mg-Zn-Li-Ca alloys from molten salts  

熔盐电解制备四元Mg-Zn-Li-Ca合金(英文)

作　　者：曹鹏 张密林 韩伟 颜永得 陈丽军 

机构地区：[1]哈尔滨工程大学教育部超轻材料与表面技术重点实验室,哈尔滨150001

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第3期861-865,共5页中国有色金属学报（英文版）

基　　金：Project(2011AA03A409) supported by the High-tech Research and Development Program of China;Projects(21103033,21101040, 21173060,91226201) supported by the National Natural Science Foundation of China;Project(HEUCF20130012) supported by the Fundamental Research Funds for the Central Universities,China;Project(1253G016) supported by the Foundation for University Key Teacher of Heilongjiang Province of China

摘　　要：Direct electrodeposition of quarternary Mg-Zn-Li-Ca alloys on a molybdenum electrode from LiCl-KCl-MgCl2-ZnCl2-CaCl2 melts at 943 K was investigated.Cyclic voltammograms（CVs） show that the deposition potential of Li shifts in a positive direction after adding MgCl2,ZnCl2 and CaCl2.Chronopotentiometric measurements indicate that the codepositon of Mg,Li,Zn,and Ca occurs at current densities lower than-1.55 A/cm2.X-ray diffraction（XRD） indicates that Mg-Zn-Li-Ca alloys with different phases were prepared via galvanostatic electrolysis.The microstructures of typical phase of Mg-Zn-Li-Ca alloys were characterized by optical microscopy（OM） and scanning electron microscopy（SEM）.The analysis of energy dispersive spectrometry（EDS） shows that elements of Mg and Ca distribute homogeneously in the Mg-Zn-Li-Ca alloy.However,element Zn mainly locates at the edges of the domain.在LiCl-KCl-MgCl2-ZnCl2-CaCl2熔盐体系中,以钼为惰性电极,在温度为943K时,直接电解制备Mg-Zn-Li-Ca四元合金。循环伏安研究表明,在LiCl-KCl熔盐体系中,添加MgCl2、ZnCl2和CaCl2后,Li的析出电位明显正移。计时电位研究表明,当阴极电流密度等于或者更负于-1.55A/cm2时,Mg、Li/Zn和Ca能够实现四元沉积。X射线衍射研究表明,恒电流电解可以制备出由不同相组成的Mg-Zn-Li-Ca合金。采用金相显微镜和电子扫描显微镜对合金样品进行表征。能谱分析结果表明,Mg元素和Ca元素在合金中分布均匀,而Zn元素主要分布在基体的边缘。

关 键 词：Mg-Zn-Li-Ca alloys ELECTROLYSIS cyclic voltammetry molten salt 

分 类 号：TG133[一般工业技术—材料科学与工程]