Tian Yanwen, Sun Benliang and Zhai
Yuchun
School of Materials & Metallurgy, Northeastern University, Shenyang
110006, P.R.China
ABSTRACT
NaCl-KCl(equimolar)-ScCl3 system was chosen as the electrolyte, 3-factor quadratic common rotation combination orthogonal design was employed to investigate the effects of temperature, t, current density, J, and the content of ScCl3 in the molten salt, w(ScCl3), on the content of Sc in the Al-Sc alloys, w(Sc), and the current efficiency, ¦ÇI, in the preparation of Al-Sc alloy with molten salt electrolysis. The regression functions of the relationships of w(Sc) and ¦ÇI with t, J and w(ScCl3) were set up. Under the conditions chosen in the experiments, w(Sc) and ¦ÇI can reach about 8% and 85% respectively.
Key words Al-Sc Alloy NaCl-KCl(equimolar)-ScCl3 system molten salt electrolysis
Project 59474011 supported by the
National Natural Science Foundation of China
Received Jul. 15 , 1997; accepted May 21, 1998