Structural Changes by Compressive Stresses of 2.0‐mol%‐Yttria‐Stabilized Tetragonal Zirconia Polycrystals

Abstract
Reorientation of the tetragonal (002) peak in tetragonal ZrO2 polycrystals (TZP) (so‐called domain switching) was studied by XRD and residual stress measurement using TZP specimens containing 2.0 mol% Y2O3 that had undergone mechanical and thermal treatments and compressive stress. The observed domain switching was due to a preferred transformation of the tetragonal phase caused by compressive stress above 70 MPa leading to a remnant c‐axis orientation normal to the compressive direction. Domain switching did not depend on thermal stress but arose directly from the tetragonal phase with little relation to monoclinic phase.

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