Veitical Sections of the АІ₂О₃-НfO₂-Еr₂О₃ Phase Diagram

Abstract

For a more complete description of the АІ₂О₃-НfO₂-Еr₂О₃ phase diagram, three vertical sections are constructed in a wide temperature and composition range. The Еr₂О₃ corner bisector shows the Еr₂О₃-rich region of the ternary phase diagram and explains the mechanisms of Еr₂О₃ phase transformations: X ⇆ H ⇆ A ⇆ B. The isopleth at 10 mol.% НfO₂ (10H) shows the АІ₂О₃-НfO₂-Еr₂О₃ constitution near the АІ₂О₃-Еr₂О₃ binary bounding system. The НfO₂ corner bisector Еr₂О₃ discovers the НfO₂-rich region of the ternary phase diagram and explains the mechanisms of НfO₂ phase transformations: F ⇆ T ⇆ M.