摘要
在773K时,采用循环伏安法、方波伏安法和计时电位法研究了Gd(III)和Al(III)在LiCl-KCl-AlCl3-GdCl3熔盐体系中的电化学行为及共电沉积制备Al-Li-Gd合金,并借助XRD,SEM-EDS对所得合金进行表征.结果表明,Gd(III)在预先沉积的Al上欠电位沉积形成了两种Al-Gd金属间化合物,当电流密度超过-279.5 mA/cm2时,Al,Gd和Li能同时析出.通过调节熔盐中AlCl3的含量可以获得不同相的Al-Li-Gd合金.Al-Li-Gd合金含有Al2Gd和Al2Gd3,Gd在合金中分布不均匀,而Al的分布相对均匀.
ABSTRACT The electrochemical co-reduction process of Gd（III）and AI（Ⅲ） and the preparation ofAI-Li-Gd al-loys were studied in LiCI-KC1-AIC13-GdCI3 molten salt at 773 K by cyclic voltammetry, square wave voltammetry and chronopotentiometry. XRD, SEM-EDS were employed to characterizeAI-Li-Gd alloys. The results suggested that the underpotential deposition （UPD） of Gd（Ⅲ） on pre-deposited A1 forms two AI-Gd intermetallic compounds. When current densities was higher than -279.5 mA/cm2, the co-reduction of A1,Li and Gd occurred. Different phas- es A1-Gd alloys can be obtained by adjusting the concentration of AIC13. XRD indicated that the AI-Li-Gd alloys contain AhGd and AI2Gd3 phases. The analysis of SEM and EDS demonstrated that the element Gd distributes un- evenly while AI is relatively uniform distribution.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第8期989-994,共6页
Acta Metallurgica Sinica
基金
国家高技术研究发展计划项目2011AA03A409
国家自然科学基金项目21103033
21101040和91226201
中央高校基础科研业务费专项资金项目HEUCF141502
黑龙江省普通高等学校及哈尔滨工程大学青年学术骨干支持计划项目1253G016和HEUCFQ1415
中国及黑龙江博士后科学基金特别项目2013T60344和LBH-TZ0411资助~~
关键词
熔盐
电化学行为
共电沉积
Al-Li-Gd合金
molten salt, electrochemical behavior, electrochemical codeposition, AI-Li-Gd alloy
