Phase Equilibria and Ordering in the System Zirconia-Hafnia-Yttria |
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| Authors: | MLADEN F TRUBELJA VLADIMIR S STUBICAN |
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| Affiliation: | Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 |
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| Abstract: | The phase equilibria in the system zirconia-hafnia-yttria were investigated at 1300° and 1600°C by precise lattice parameter measurements and the direct phase-inspection method. Large fluorite solid solution regions were dominant at both investigated temperatures. The extent of ordering within the ternary system was studied in the samples containing 40 mol% yttria at 1300°C. The δ-phase (Zr,Hf)3Y4O12 formation was established only in those samples with less than 15 mol% hafnia. |
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