Thermodynamic description of the Aluminum-Lithium phase diagram

The thermodynamic optimization of the al-li binary system was carried out with the help of calculation of phase diagram (calphad) method. al2li3,al4li5 and alli2 have been treated as stoichiometric compounds while a solution model has been used for the description of the liquid,fcc_a1 (al) and bcc_a2 (li) phases. the non-stoichiometric alli phase with a narrow homogeneity range was modeled using a two-sublattice model with a mutual substitution of al and li on both sublattice. the optimization is carried out in the thermo-calc package. a set of self-consistent thermodynamic parameters are obtained. the calculated phase diagram and thermodynamic properties agree well with the available experimental data.