氯化物熔盐体系共电沉积法制备Al-Li-Gd合金的研究*
颜永得, 男, 1979年生, 副教授, 博士
收稿日期: 2014-01-10
修回日期: 2014-04-09
网络出版日期: 2014-08-25
基金资助
* 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
STUDY ON PREPARATION OF Al-Li-Gd ALLOYS BY ELECTROCHEMICAL CODEPOSITION FROM CHLORIDE MELTS
Received date: 2014-01-10
Revised date: 2014-04-09
Online published: 2014-08-25
Supported by
Supported by High Technology Research and Development Program of China (No.2011AA03A409), National Natural Science Foundation of China (Nos.21103033, 21101040 and 91226201), Fundamental Research Funds for the Central Universities (No.HEUCF141502), Foundation for University Key Teacher of Heilongjiang Province and Harbin Engineering University (Nos.1253G016 and HEUCFQ1415) and Special Foundation of China and Heilongjiang Postdoctoral Science Foundation (Nos.2013T60344 and LBH-TZ0411)
在773 K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.
关键词： 熔盐; 电化学行为; 共电沉积; Al-Li-Gd合金
颜永得 , 杨晓南 , 张密林 , 李星 , 王丽 , 薛云 , 张志俭 . 氯化物熔盐体系共电沉积法制备Al-Li-Gd合金的研究*[J]. 金属学报, 2014 , 50(8) : 989 -994 . DOI: 10.11900/0412.1961.2014.00026
The electrochemical co-reduction process of Gd(III) and Al(III) and the preparation of Al-Li-Gd alloys were studied in LiCl-KCl-AlCl3-GdCl3 molten salt at 773 K by cyclic voltammetry, square wave voltammetry and chronopotentiometry. XRD, SEM-EDS were employed to characterize Al-Li-Gd alloys. The results suggested that the underpotential deposition (UPD) of Gd(III) on pre-deposited Al forms two Al-Gd intermetallic compounds. When current densities was higher than -279.5 mA/cm2, the co-reduction of Al, Li and Gd occurred. Different phases Al-Gd alloys can be obtained by adjusting the concentration of AlCl3. XRD indicated that the Al-Li-Gd alloys contain Al2Gd and Al2Gd3 phases. The analysis of SEM and EDS demonstrated that the element Gd distributes unevenly while Al is relatively uniform distribution.
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