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Microstrain and the Mechanism of the Reversible Monoclinic ⇌ Tetragonal Phase Transformation in Zirconia

  • S. T. Buljan
  • H. A. McKinstry
  • V. S. Stubican

Abstract

The Warren-Averbach method was used to evaluate the microstrain involved in the monoclinic ⇌ tetragonal transformation of ZrO2. As the transformation proceeds microstrain reaches a maximum of 1.9 x 10-3 when 50% of the monoclinic phase has been transformed. Similar behavior was found on cooling. A large hysteresis in microstrain was observed in this transition. The extent of the coherent interface between two phases could explain the behavior of microstrain.

Optical observations have shown that the tetragonal phase is usually twinned on the \({(1\bar 12)_{bct}}{(\bar 112)_{bct}}\) plane and the extent of twinning is influenced by the heating rate. Orientation relations in Zr02 transformation are:
$${(100)_m}\left\| {{{(100)}_{bct}};{{[010]}_m}} \right\|{[001]_{bct}}$$
and by the virtue of twinning
$${(100)_m}\left\| {{{(100)}_{bct}};{{[001]}_m}} \right\|{[001]_{bct}}$$
.

Keywords

Tetragonal Phase Monoclinic Phase Coherent Interface Transformation Region Coherent Domain Size 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    A. R. Stokes, Proc. Phys. Soc., 61(1948) 382.Google Scholar
  2. 2.
    B. E. Warren and B. L. Averbach, J. Appi. Phys. 21 (1950) 595.CrossRefGoogle Scholar
  3. 3.
    H. A. McKinstry, J. Appl. Phys. 41(1970) 13 and 5074.Google Scholar

Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • S. T. Buljan
    • 1
  • H. A. McKinstry
    • 1
  • V. S. Stubican
    • 1
  1. 1.Materials Research LaboratoryThe Pennsylvania State UniversityUniversity ParkUSA

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