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High Resolution Electron Microscopy of Internal Interfaces in Partially-Stabilized Zirconia (Psz)

Published online by Cambridge University Press:  28 February 2011

A. H. Heuer  and
R. M. Dickerson
A. H. Heuer
Affiliation:
Case Western Reserve University, Department of Materials Science and Engineering, Cleveland, Ohio 44106
R. M. Dickerson
Affiliation:
Case Western Reserve University, Department of Materials Science and Engineering, Cleveland, Ohio 44106
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Abstract

Low solute tetragonal (t) ZrO2 precipitates within a high solute cubic (c) ZrO2 matrix of a Zr-rich CaO-MgO-ZrO2 alloy were studied via high resolution electron microscopy (HREM). The precipitates underwent displacive thin foil transformations to orthorhombic (o) or monoclinic (m) symmetry during sample preparation or observation in the HREM. The orthorhombic phase grew in a facetted manner from a relatively equiaxed nucleus, consuming entire t-ZrO2 variants in multi-variant precipitates. Monoclinic laths nucleated it t/c or t/t interfaces and rapidly grew across portions of the parent phase. The crystallography of these transformations is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 138: Symposium Q – Characterization of the Structure and Chemistry of Defects in Materials , 1988 , 449
Copyright
Copyright © Materials Research Society 1989

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