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The activity of zinc of three liquid ternary alloys (Cu, Ag, Au)-Sb-Zn was measured with an emf (electromotive force) method. From these measurements the thermodynamic properties were derived. This set of data is compared with the results of a calculation using four different models. For this calculation the thermodynamic properties of the binary systems were used.
In the framework of COST Action 507, a thermodynamic evaluation of the binary system Si-Sn has been given. The result of the analysis are the excess Gibbs energies of the liquid and the diamond phases of the system. The results of the calculations are compared with published experimental data and cover a temperature range of 400-1700 K.
Thermochemical and phase diagram data taken from literature have been critically evaluated. For both the liquid and Ge-diamond phases, the excess Gibbs energies were described by the Redlich-Kister formula. Phase diagram and thermodynamic functions calculated from the optimized set of Gibbs energies are presented.
A computer program is written to draw predominance area diagrams in METAL - OXYGEN - SULFUR systems. The methods used to draw these diagrams for different axes are explained. As an example, the predominance area diagram in the NICKEL - OXYGEN - SULFUR system is plotted for different axes. The results are compared to the reported diagrams in the literature and the accuracy of these diagrams are...
A useful dialogue between those involved in the ab initio calculation of phase diagrams and the CALPHAD community is being impeded by the solution models currently used in free energy minimisation packages. The present paper discusses a versatile solution model, incorporating more physics than in current models. It is suitable for incorporating calculated parameters as they become available...
A program referred to as TXY-CALC has been developed for the calculation of thermodynamic properties and phase equilibria in ternary systems. The algorithmic method and the features of the program are briefly outlined. The program has been applied to the system (Li,Na,K)Br. For this system the solid-liquid equilibria have been investigated using DTA. The results of the calculations are compared...
A thermodynamic assessment of the CeO 2 -LaO 1.5 system has been conducted and combined with recently evaluated thermodynamic parameters for the ZrO 2 -CeO 2 and ZrO 2 -LaO 1.5 systems to predict the ZrO 2 -CeO 2 -LaO 1.5 ternary phase diagram. Based on the predicted 1400°C isothermal section, twenty-five...
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