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)
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.
Yongde YAN , Xiaonan YANG , Milin ZHANG , Li WANG , Yun XUE , Zhijian ZHANG . STUDY ON PREPARATION OF Al-Li-Gd ALLOYS BY ELECTROCHEMICAL CODEPOSITION FROM CHLORIDE MELTS[J]. Acta Metall Sin, 2014 , 50(8) : 989 -994 . DOI: 10.11900/0412.1961.2014.00026
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