Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 94, Issue 6, Pages 1744-1746Publisher
WILEY
DOI: 10.1111/j.1551-2916.2010.04333.x
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Funding
- Office of Naval Research [N00014-08-1-1029]
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A reversible phase transformation (RPT) process is observed that converts fully dense polycrystalline Y2O3 directly into the nanocrystalline state. The process involves a forward transformation from cubic-to-monoclinic symmetry under a high pressure and a reverse transformation from monoclinic-to-cubic symmetry under a lower pressure. An example is given of a reduction in grain size of cubic-Y2O3 from 300 to 0.1 mu m in a single pressure-induced RPT at 1000 degrees C.
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