THE Al₂O₃–HfO₂–La₂O₃ Phase Diagram.
II. Phase Equilibria at 1250 and 1600 °С

Abstract

The isothermal sections at 1250 and 1600 °С for the Al₂O₃–HfO₂–La₂O₃ phase diagram are constructed for the first time. No ternary compounds and appreciable regions of solid solutions based on components or binary compounds are found in the ternary system. Triangulation of the system is determined by the La₂Hf₂O₇ phase as the most thermodynamically stable.