PHYSICOCHEMICAL MATERIALS RESEARCHVERTICAL SECTIONS OF THE PHASE DIAGRAM

摘要

For a more complete description of the Al_2O_3-HfO_2-Er_2O_3 phase diagram, three vertical sections are constructed in a wide temperature and composition range. The Er_2O_3 corner bisector shows the Er_2O_3-rich region of the ternary phase diagram and reveals the mechanisms of Er_2O_3 phase transformations: XóHóA óB. The isopleth at 10 mol.% HfO_2 (10H) shows the Al_2O_3-HfO_2-Er_2O_3 constitution near the Al_2O_3-Er_2O_3 binary bounding system. The HfO_2 corner bisector discovers the HfO_2-rich region of the ternary phase diagram and the mechanisms of HfO_2 phase transformations: F ±7T 5M.