THERMODYNAMIC CALCULATION OF THE O-TI SYSTEM

The O-Ti binary system has been assessed to produce Gibbs energy param eters for the condensed phases and were evaluated as representations o f thermodynamic models. The liquid phase was described in terms of an association model with one associate, the bcc, A2; cph, A3 and fee, A1 phases were described as interstitial solid solutions, and the O2Ti, O3Ti5, O3Ti2, and OTi oxides were considered to be stoichiometric comp ounds, The thermodynamic parameters were optimized taking into account experimental phase diagram and thermodynamic values from the literatu re, The phase diagram and the thermodynamic properties were calculated and compared with experimental data.