Electrolytic and Electroless Fabrication of Al-Sc Alloys in KF-Naf-AlF3 Electrolytes

Tuesday, 26 May 2015: 12:00
Williford Room C (Hilton Chicago)


The Al-Sc alloys were obtained in the KF-NaF-AlF3 electrolyte containing Sc2Oand  Al2Oat 800 oC by chemical and electrochemical techniques. Electrolysis was performed in a 20 A lab-scale cell with graphite anode and aluminum cathode. An impact of the cathode current density (0-1 A∙cm-2), the Sc2O3 content (1, 2, 4, and 8 wt%) in the KF-NaF-AlF3 electrolyte, the rate of the molten aluminum agitation (0, 100 rotates/min), and the synthesis duration (30-210 min) on the Sc content in the Al-Sc alloy was studied. The Al-Sc alloys with the Sc content of 0.30-1.80 wt%, depending on the synthesis conditions, and with the uniform Sc distribution throughout the aluminum matrix were produced. The peculiarities of the electrolytic and electroless fabrication of the Al-Sc alloys in the KF-NaF-AlF3-Al2O3-Sc2O3 electrolytes at 800 oC in comparison with the processes occurred in the NaF-AlF3-Al2O3-Sc2O3 melts at 980 oC are discussed.