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Ferroelastic Domain Switching In Tetragonal Zirconia

Published online by Cambridge University Press:  26 February 2011

C. J. Chan ,
F. F. Lange ,
M. Rühle ,
J. F. Jue  and
A. V. Virkar
C. J. Chan
Affiliation:
Now at IBM Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heighls, NY 10598 Materials Department, University of California, Santa Barbara, CA 93106
F. F. Lange
Affiliation:
Materials Department, University of California, Santa Barbara, CA 93106
M. Rühle
Affiliation:
Materials Department, University of California, Santa Barbara, CA 93106 Now at Max-Planck-lnstitut fOr Metallforschung, Seestr. 92. 7000 Stultgart 1, Federal Republic of Germany
J. F. Jue
Affiliation:
Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112
A. V. Virkar
Affiliation:
Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112
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Abstract

Ferroelastic domain switching is one of the possible toughening mechanisms in ceramic materials. Microstructural evidence of domain reorientation (switching) in polydomain tetragonal zirconia single crystals is observed upon the application of a unidirectional compressive stress. Dark field imaging of the three {112} tetragonal twin variants in a {111} zone indicates that two sets of twin variants grow at the expense of the third set upon application of uniaxial compression. The diminishing variant is the one with its c axis parallel to the compression axis. Indentation experiments on uniaxially compressed samples show an anisotropy in crack length. Crack propogates more easily along the loading direction. A construction for the orientation relationship of domains and their twin boundaries is presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 209: Symposium K – Defects in Materials , 1990 , 725
Copyright
Copyright © Materials Research Society 1991

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References

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