Eutectic Composition in the Pseudobinary of Y4Al2O9 and Y2O3 |
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Authors: | Tai-Il Mah M Dennis Petry |
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Affiliation: | UES, Inc., Dayton, Ohio 45432–1894 |
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Abstract: | The eutectic composition between Y4Al2O9 and Y2O3 was determined using electron probe microanalysis (EPMA) on directionally solidified specimens with hypo- and hypereutectic compositions. The microstructures of the specimens as a function of composition differ considerably with small deviation from the eutectic composition (70.5 mol% Y2O3 and 29.5 mol% Al2O3). Based on the current results and other published data, the pseudobinary system between Al2O3 and Y2O3 is revised. |
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Keywords: | solidification eutectics yttrium aluminates yttria |
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