Concentration dependence of the excess specific heat capacity and of the thermodynamic factor for diffusion in f.c.c. and b.c.c. ordering systems

Abstract

The concentration dependence of the configurational specific heat capacity and of the thermodynamic factor for diffusion have been calculated for f.c.c. Ni–Al and b.c.c. Fe–Al alloys using the Cluster Variation Method in the tetrahedron approximation. Unexpected variations have been obtained, particularly close to stoichiometric compositions.