STRUCTURE-FUNCTION AND DYNAMIC SCALING OF CUCO ALLOYS DURING PHASE-SEPARATION

Based on the nonlinear Cahn theory and the Langer equation of motion f or the structure function, a simple computational technique of structu re function S(k,t), where k is the wave vector in Fourier space and t the time, has been proposed. This technique has been applied to calcul ate the dynamics of phase separation of CuCo alloys over the whole ran ge of composition. A series of dynamic characters and scaling properti es involved in the evolution of the structure function have been analy sed and a comparison with the current theories has been made, demonstr ating that the nonlinear Cahn theory makes sense as a general dynamic theory of phase separation in alloys.