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On the Conversion of Bulk Polycrystalline Y2O3 into the Nanocrystalline State

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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 μm in a single pressure-induced RPT at 1000°C.
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Document Type: Research Article

Affiliations: 1: Center for Nanomaterials Research, Rutgers University, Piscataway, New Jersy 08854 2: Diamond Materials Inc., Piscataway, New Jersey 08854 3: Raytheon IDS, Andover, Massachusetts 01810

Publication date: 01 June 2011

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