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Mechanical Properties of an Extremely Tough 1.5 mol% Yttria Stabilized Zirconia Material
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: Received: 12 July 2024 / Approved: 15 July 2024 / Online: 15 July 2024 (14:37:43 CEST)
How to cite: Kern, F.; Osswald, B. Mechanical Properties of an Extremely Tough 1.5 mol% Yttria Stabilized Zirconia Material. Preprints 2024, 2024071207. https://doi.org/10.20944/preprints202407.1207.v1 Kern, F.; Osswald, B. Mechanical Properties of an Extremely Tough 1.5 mol% Yttria Stabilized Zirconia Material. Preprints 2024, 2024071207. https://doi.org/10.20944/preprints202407.1207.v1
Abstract
Yttria stabilized zirconia (Y-TZP) ceramics with drastically reduced yttria content have been introduced by different manufacturers aiming at improving the damage tolerance of ceramic components. In this study an alumina doped 1.5Y-TZP was axially pressed, pressureless sintered in air at 1250–1400 °C for 2 h and characterized with respect to mechanical properties, microstructure and phase composition. The material exhibits a combination of high strength of 1000 MPa and a high toughness of 8.5–10 MPa√m. The measured fracture toughness is, however, extremely depending on measurement protocol. Direct crack length measurements overestimate toughness due to trapping effects. The initially purely tetragonal material has a high transformability of > 80 %, the transformation behavior is predominantly dilatoric, measured R-curve related toughness increments are in good agreement with transformation toughness increments derived from XRD data.
Keywords
zirconia; mechanical properties; transformation toughening; microstructure
Subject
Chemistry and Materials Science, Ceramics and Composites
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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