2011XXXVII JEEP – 37th Conference on Phase Equilibria
|Number of page(s)||7|
|Published online||05 October 2011|
Thermodynamic description of the Gallium-Lanthanum binary system
Lycée Hoummane Elftwaki, Dcheira, Agadir, Maroc
2 Laboratoire de Physicochimie de l’Etat Solide, ICMMO, Université de Paris-Sud, 91405 Orsay Cedex, France
Until now, no thermodynamic calculation has been done for the Ga-La system In the present work, it has been evaluated by means of the Calphad approach The solution phases (Liquid, (αLa), (βLa) and (γLa)) were modelled with the sublattice formalism and the excess term of the Gibbs energy with the Redlich-Kister equation. The intermetallic compound Ga2La which has a homogeneity range, was treated as the formula (Ga)0.667 (Ga,La)0.333 by a two-sublattice model with Ga on the first sublattice and Ga and La on the second one. Ga6La, Ga4La, GaLa, Ga3La5, GaLa3 have been treated as stoichiometric compounds. The calculated phase diagram and the thermodynamic properties of the system are in satisfactory agreement with the experimental data.
© Owned by the authors, published by EDP Sciences, 2011