Electrowinning of Al-Sc Master Alloys in the LiF-AlF3-Sc2O3 Melts

会议论文
发表日期：

2024年

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Andrey Yasinskiy,
Ilya Moiseenko,
Dmitriy Varyukhin,
Anastasia Saparova,
Aleksandr Samoilo,
Pavel Yuryev,
Youjian Yang,
Zhongning Shi,
Zhaowen Wang,
Peter Polyakov,
Bernd Friedrich

摘要

AluminumAluminum–scandiumScandium master alloysMaster alloy are highly demanded products used to create multi-functional aluminum alloysAluminum alloys and composites. A high cost of Al-Sc master alloysMaster alloy stops the automotiveAutomotive industry from using them widely. This research investigates the possibility to produce Al-ScAl-Sc master alloysMaster alloy via electrolysisElectrolysis of the LiF-AlF3-Sc2O3 melt. The kinetic parameters of the aluminumAluminum and scandiumScandium electrowinningElectrowinning were studied by means of voltammetryVoltammetry, stationary polarization, and electrolysisElectrolysis tests. The apparent limiting current density for co-deposition of AluminumAluminum and ScandiumScandium on tungsten cathodeCathode was in the range from 1.28 to 1.97 A.cm–2 in the temperature range from 860 to 940 °C. Based on the electrochemical measurements, the parameters for galvanostatic electrolysisElectrolysis were selected and electrolysisElectrolysis tests were carried out to obtain Al-Sc master alloysMaster alloy. The microstructureMicrostructure of the obtained Al-Sc master alloysMaster alloy was studied. It was possible to obtain Al-Sc alloysAl-Sc alloys with the concentration of Sc 0.68 wt.%.