KINETICS OF DECOMPOSITION OF THE SOLID SOLUTION OF SCANDIUM IN ALUMINUM IN BINARY Al - Sc ALLOYS

摘要

C-curves of isothermal decomposition of the solid solution of scandium in aluminum are plotted for binary Al - Sc alloys with different scandium content. It is shown that growth in the scandium content from 0.14 to 0.55% reduces the incubation period by 2 - 3 orders of magnitude and increases the rate of the decomposition by 2 orders of magnitude. The causes of the accelerated decomposition of the solid solution of scandium in aluminum are discussed.