Abstract
For more complete description of the Al2O3–HfO2–Gd2O3 phase diagram, three vertical sections are constructed in a wide temperature and composition range. The Gd2O3 and HfO2 corner bisectors explain the mechanisms of Gd2O3 phase transformations, C ⇆ X ⇆ H ⇆ A ⇆ B, and interactions in the HfO2 corner of the system. The isopleth at 15 mol.% HfO2 (15H) shows the Al2O3–HfO2–Gd2O3 constitution in Al2O3- and Gd2O3-rich regions.
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