Abstract
For more complete presentation of the Al2O3-ZrO2-Yb2O3 phase diagram, three vertical sections are constructed over a wide temperature and composition range. The bisector Al2O3/ZrO2 = 1 discovers the Yb2O3-rich corner of the ternary phase diagram and explains the mechanism of Yb2O3 phase transformation H ⇄ C. The isopleth 15 mole% ZrO2 (15Z) shows the Al2O3-ZrO2-Yb2O3 structure near the Al2O3-Yb2O3 bounding binary system. The bisector Al2O3/Yb2O3 = 1 depicts the ternary system in the ZrO2-rich region. The vertical sections intersect each of the three triangulating sections of the Al2O3-ZrO2-Yb2O3 system and demonstrate the width variation of its two-phase regions.
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