Electrochemical behaviour and codeposition of Al-Li-Er alloys in LiCl-KCl-AlCl_3-Er_2O_3 melts

作     者：孙怡 张密林 韩伟 颜永得 杨育圣 孙运霞 

作者机构：Key Laboratory of Superlight Materials and Surface TechnologyMinistry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2013年第31卷第2期

页      面：192-197页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project supported by the National 863 Project of the Ministry of Science and Technology of China(2009AA050702,2011AA03A409) National Natural Science Foundation of China(21173060) 

主　　题：Al-Li-Er alloys electrochemical codeposition rare earth oxide molten salt 

摘      要：The electrochemical behaviour of Al, Li, and Er were investigated by electrochemical techniques, such as cyclic voltammograms, chronopotentiometric, chronoamperograms, and open circuit chronopotentiogram on molybdenum electrodes. The results showed that the underpotential deposition of erbium on pre-deposited Al electrodes formed two Al-Er intermetallic compounds. The codeposition of Al, Li, Er occurred and formed Al-Li-Er alloys in LiCl-KCl-AlCl3 -Er2O3 melts at 773K. Different phases such as Al2Er, Al2Er3 and βLi phase of Al-Li-Er alloys were prepared by galvanostatic electrolysis and characterized by X-ray diffraction （XRD）. Scanning electron microscopy （SEM） indicated that Er element mainly distributed at the grain boundary. ICP analyses showed that lithium and erbium contents of Al-Li-Er alloys could be controlled by AlCl3 and Er2O3 concentration and electrochemical parameters.