Phenomenological Calculation of the L1<SUB>0</SUB>-Disorder Phase Equilibria in the Co–Pt System

Abstract

The phenomenological calculation of the L10-disorder phase equilibria in the Co–Pt binary system is attempted by using the Lennard-Jones type potential combined with the tetrahedron approximation of the Cluster Variation Method. Thermal vibration effects based on the Debye-Grüneisen model are introduced into the calculation scheme. The calculated thermodynamic properties and phase diagram are presented and the thermal vibration effects on phase stability are examined.