Structural Characterization of High‐Temperature Zirconia Ceramics by Perturbed Angular Correlation Spectroscopy
- 1 June 1986
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 69 (6) , 458-463
- https://doi.org/10.1111/j.1151-2916.1986.tb07445.x
Abstract
Perturbed angular correlation spectra of γ‐rays emitted following the decay of dilute 181Hf in several zirconia ceramics are reported. Spectra for monoclinic and tetragonal zirconia, a tetragonal zirconia/yttria alloy, a cubic zirconia/yttria alloy, and two mixed tetragonal/cubic‐phase zirconia/yttria alloys were measured as a function of temperature to 1470°C. The spectrum observed for each phase has a unique signature, and the spectrum of mixed‐phase materials can be used to determine the relative amounts of the different phases. These data give a cubic/(cubic + tetragonal) phase boundary that is somewhat lower in temperature than indicated by current phase diagrams.Keywords
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