氟盐-氧化物体系熔盐电解沉积Al-Cu-Y合金基础研究

本项目拟采用氟盐-氧化物体系熔盐电解沉积制备Al-Cu-Y合金，在研究AlF3-(Li,Na)F-(Al2O3-CuO-Y2O3)体系的密度、粘度、电导率等基本物理化学性质变化规律，重点掌握Y2O3的溶解度及溶解机理基础上，运用电位扫描、阶跃脉冲、阻抗等电化学技术分析和揭示体系在电解过程中活性物质的传输规律及动力学参数、活性金属离子的沉积过程及合金化机理，特别是Y(Ⅲ)离子电极反应机制。对实验室200A级小型电解槽的上插阳极、液态下阴极及电解质的电场分布进行数值模拟。重点研究电解过程中Al-Cu-Y 合金产物成分、杂质的调控机制，以及在熔体中的溶解损失和二次作用。为氟盐-氧化物体系电解制备Al-Cu-Y合金提供理论基础和技术原型。

The theme of research project is preparing for Al-Cu-Y alloy by molten salt electrolysis in the fluoride salt-oxide system. First, the basic physical and chemical properties(such as density, viscosity, electrical conductivity) of AlF3-(Li,Na)F-(Al2O3-CuO-Y2O3) system and the solubility and dissolution mechanism of Y2O3 will be studied systematically. Second, the transmission rule and kinetic parameters of active material, the deposition process and alloying mechanism of active ion, especially the electrode reaction mechanism of Y (Ⅲ) ion, will be investigated by electrochemical technology, such as potential scan, step pulse, impedance analysis method. Thirdly, the distribution of electric field(anode, liquid cathode and electrolyte) of electrolytic cell (200A grade for laboratory) will be surveyed by numerical simulation method. The regulatory mechanism of composition and impurities of Al-Cu-Y alloy in the process of electrolytic, and dissolved loss and secondary role of alloy product in the melt, will be studied systematically and seriously. The purpose of research project is providing the theory basis and technical prototype for preparing of Al-Cu-Y alloy by molten salt electrolysis in the fluoride salt-oxide system.