Elastic constants of yttria (Y2O3) monocrystals to high temperatures

James W. Palko, Waltraud M. Kriven, Stanislav V. Sinogeikin, Jay D. Bass, Ali Sayir

Research output: Contribution to journalArticlepeer-review


The single-crystal elastic moduli of yttria have been measured by Brillouin spectroscopy up to 1200°C. The room temperature values obtained are C11 = 223.7±0.6GPa, C44 = 74.6±0.7GPa, and C12 = 112.4±1.1 GPa. The resulting bulk and (Voigt-Reuss-Hill) shear moduli are K = 149.5±1.0GPa and GVRH = 66.3±0.8GPa, respectively. These agree much more closely with experimental values reported for polycrystalline samples than do previous single-crystal measurements. Linear least squares regressions to the variation of bulk and shear moduli with temperature result in derivatives of dK/dT= -17±2 MPa/°C and dGVRH/dT= -8±2 MPa/°C. Elastic anisotropy was found to remain essentially constant over the temperature range studied.

Original languageEnglish (US)
Pages (from-to)7791-7796
Number of pages6
JournalJournal of Applied Physics
Issue number12
StatePublished - Jun 2001

ASJC Scopus subject areas

  • General Physics and Astronomy


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