Lab Scale Synthesis of Al-Sc Alloys in NaF-AlF<sub>3</sub>-Al<sub>2</sub>O<sub>3</sub>-Sc<sub>2</sub>O<sub>3</sub> Melt

Abstract

The liquidus temperature in the [NaF-AlF3(30 mol.%)]-Sc2O3 molten system with the Sc2O3 additions up to 12 wt% was measured by the thermo analysis. The effect of the cathode current density (0, 0.25, 0.50, and 1.0 A∙cm-2), the Sc2O3 content (1, 2, 4, and 8 wt%) in the NaF-AlF3(30 mol.%)-Al2O3-Sc2O3 electrolyte, the rate of the molten aluminum agitation (0, 100 rotates/min), the synthesis duration (30-210 min) on the Sc content in the aluminum alloy at 980 °С was studied. The Al-Sc alloys with the scandium content of 0.15-1.30 wt%, depending on the synthesis conditions, and with the uniform Sc distribution throughout the aluminum matrix were produced.