Isothermal Sections of the Al₂O₃–TiO₂–Y₂O₃ Phase Diagram at 1550 and 1400 °С

Abstract

The isothermal sections at 1550 and 1400 °С for the Al₂O₃–TiO₂–Y₂O₃ phase diagram are constructed for the first time. New phases or appreciable homogeneity phases based on components and binary compounds are not found in the ternary system. Triangulation of the system is determined by the Y₂T₂O₇ phase, which is in equilibrium with compounds Al₂TiO₅, Y₃Al₅O₁₂, YAlO₃, and Y₄Al₂O₉ and components TiO₂ and Al₂O₃. The system is triangulated into six secondary triangles, in which three-phase eutectics are expected. In five quasibinary sections, two-phase eutectics should be expected to exist.