THERMODYNAMICS OF Cu-Y-M(M=Al,Si,Ti,Fe) LIQUID SOLUTIONS
来源期刊：中国有色金属学报(英文版)1994年第4期
论文作者：Du Ting Li Guodong
文章页码：16 - 19
Key words：iso-activity; interaction coefficient; Cu-Y-M(M=Al; Si; Ti; Fe)
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℃.
