QUASI-CHEMICAL MODEL FOR INTERSTITIAL SOLUTIONS

An ideal solution is one in which the enthalpy of mixing is zero so th at the only contribution to the free energy of mixing comes from the c hange in configurational entropy when atoms mix at random. Regular sol utions have a finite enthalpy of mixing but nevertheless assume random mixing. Quasichemical models avoid this approximation of random mixin g. The present study deals with an amendment to some of the equations in the quasichemical theory for Fe-C solutions, making the equations, Sol example, more reliable at large C-C repulsions. (C) 1998 The Insti tute of Materials.