中國(guó)有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 4 No. 4 December 1994 |
THERMODYNAMICS OF Cu-Y-M(M=Al,Si,Ti,Fe)LIQUID SOLUTIONS
Du Ting ;Li Guodong
（Central Iron and Steel Research Institute; Beijing 100081）
Abstract:The iso-activity of [Y] of samples reached in multiple-hole-graphite crucibles by controlling the oxygen potential through the reaction 2[Y]＋3CO=Y2O3＋3C. Combining conjugate gradient method of solving ill-conditioned equations, the activity interaction coefficients betweer Y and Al, Si, Ti, Fe alloying elements were determined. The equilibrium constant of the reaction Z[Y]＋3[O]=Y2O3 and the standard free energy of formation of Y2O3 in liquid Cu were obtained at 1200℃.
Key words: iso-activity interaction coefficient; Cu-Y-M(M=Al; Si; Ti; Fe)
