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在773 K的LiCl-KCl-AlCl_3-Y_2O_3熔盐体系中,采用循环伏安、方波伏安、开路计时电位和稳态极化研究了不同相的Al-Y合金的电化学制备过程。电化学研究表明钇在预先沉积的铝上欠电位沉积形成了2种铝钇金属间化合物。X射线衍射研究表明:这2种Al-Y金属间化合物为Al_2Y和α-Al_3Y。通过金相显微镜和电子扫描显微镜对合金样品进行了表征,结果显示钇元素主要分布于块状析出物上。通过调节熔盐中AlCl_3的含量可以获得不同相的Al-Y合金。
In 773 K LiCl-KCl-AlCl 3 -Y 2 O 3 molten salt system, cyclic voltammetry, square wave voltammetry, open-circuit chronopotentiometry and steady-state polarization were used to study the electrochemical preparation of Al-Y alloys in different phases. Electrochemical studies show that yttrium forms two kinds of aluminum-yttrium intermetallic compounds by underpotential deposition on pre-deposited aluminum. X-ray diffraction studies show that the two Al-Y intermetallic compounds are Al 2 Y and α-Al 3 Y. The alloy samples were characterized by metallographic microscope and scanning electron microscope. The results show that the yttrium is mainly distributed in the massive precipitates. Al-Y alloys with different phases can be obtained by adjusting the content of AlCl 3 in molten salt.