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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.
The electrochemical behavior and co-electrodeposition of Gd (III) and Al (III) in LiCl-KCl-AlCl3-GdCl3 molten salt system were investigated by cyclic voltammetry, square wave voltammetry and chronopotentiometry at 773K The Al-Li-Gd alloy was prepared and characterized by XRD and SEM-EDS.The results show that Gd (III) forms two Al-Gd intermetallic compounds by underpotential deposition on pre-deposited Al, When the density exceeds -279.5 mA / cm2, Al, Gd and Li can be precipitated at the same time.Al-Li-Gd alloys with different phases can be obtained by adjusting the content of AlCl3 in molten salt.The Al-Li-Gd alloy contains Al2Gd and Al2Gd3, Gd The distribution of the alloy is not uniform, while the distribution of Al is relatively uniform.