Surface modification in polycrystalline Y2O3 under high-pressure/high-temperature processing conditions

Jafar F. Al-Sharab, Stuart Deutsch, Christopher S. Nordahl, Stephen D. Tse, Bernard H. Kear

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


A pressure-induced phase transformation is used to refine the grain size of polycrystalline Y2O3, by a factor of 3000. A surface modification effect accompanies the observed grain refinement, which becomes more apparent with increasing holding time under high pressure. The surface-modified layer exhibits lower hardness and lower oxygen content relative to the underlying material. Moreover, it possesses columnar-grained structure with cubic symmetry, whereas the interior has a monoclinic structure.

Original languageEnglish (US)
Pages (from-to)1966-1971
Number of pages6
JournalJournal of the American Ceramic Society
Issue number6
StatePublished - Jun 2013

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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