A THERMODYNAMIC ASSESSMENT OF THE AL-CU-MG TERNARY-SYSTEM

A thermodynamic assessment of the Al-Cu-Mg ternary system is presented , The Gibbs energies for the liquid and solid solution phases were mod eled using the Redlich-Kister polynomial and the Wagner-Schottky model represented by the compound-energy formalism, The model parameters we re obtained after fitting to previously critically assessed experiment al phase diagram and thermodynamic data available in the literature. T he thermodynamic functions and phase diagram calculated using the mode l parameters describe quite well the known experimental information, T he complete set of Gibbs energies for all phases appearing in this sys tem enables the calculation of thermodynamic values as a function of c omposition and temperature even for those ranges where no experimental information is available.