Quasichemical model for interstitial solutions

Abstract

An ideal solution is one in which the enthalpy of mixing is zero so that the only contribution to the free energy of mixing comes from the change in configurational entropy when atoms mix at random. Regular solutions have a finite enthalpy of mixing but nevertheless assume random mixing. Quasichemical models avoid this approximation of random mixing. The present study deals with an amendment to some of the equations in the quasichemical theory for Fe-C solutions, making the equations, for example, more reliable at large C-C repulsions.