Thermodynamic assessment of the ZrO₂-AlO_1.5 system

Abstract

The ZrO₂-AlO_1.5 quasibinary system has been assessed by means of the CALPHAD (CALculation of PHAse Diagram) technique. The liquid phase, cubic (fluorite-type) zirconia solid solution and tetragonal zirconia solid solution are described by a regular solution model. The monoclinic zirconia and α-AlO_1.5 are treated as stoichiometric phase. A consistent set of optimized parameters describing the system have been obtained to agree with almost all of the avaiable experimental data. Comparisons between the assessed and experimental data are presented. It is shown that further studies are needed for equilibrium solubilities of AlO_1.5 in ZrO₂ phases.

Keywords

phase diagram / thermodynamics / modeling / zirconia / alumina

References

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