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Evaluation of fracture toughness of zirconia ceramics with heterogeneous yttrium distribution microstructures

Evaluation of fracture toughness of zirconia ceramics with heterogeneous yttrium distribution... Yttrium stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramics containing 2 mol% and 2.5 mol% yttria were prepared by mixing 3 mol% yttria-doped zirconia powders with yttria-free zirconia powders. The microstructures of the sintered samples were studied using SEM, XRD, and Raman spectra. In addition, an ultra-sharp V-notch (ρ < 0.5 μm) was induced by femtosecond laser to measure its actual fracture toughness by single-edge V-notched beam (SEVNB) method. The results reveal that mixture-based Y-TZP with 2.5 mol% yttria has deeper phase transformation depth, and fracture toughness of 6.4 MPa.m1/2 is obtained. The heterogeneous distribution of the yttrium is taken account for the excellent properties. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Australian Ceramic Society Springer Journals

Evaluation of fracture toughness of zirconia ceramics with heterogeneous yttrium distribution microstructures

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Publisher
Springer Journals
Copyright
Copyright © Australian Ceramic Society 2020
ISSN
2510-1560
eISSN
2510-1579
DOI
10.1007/s41779-020-00474-0
Publisher site
See Article on Publisher Site

Abstract

Yttrium stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramics containing 2 mol% and 2.5 mol% yttria were prepared by mixing 3 mol% yttria-doped zirconia powders with yttria-free zirconia powders. The microstructures of the sintered samples were studied using SEM, XRD, and Raman spectra. In addition, an ultra-sharp V-notch (ρ < 0.5 μm) was induced by femtosecond laser to measure its actual fracture toughness by single-edge V-notched beam (SEVNB) method. The results reveal that mixture-based Y-TZP with 2.5 mol% yttria has deeper phase transformation depth, and fracture toughness of 6.4 MPa.m1/2 is obtained. The heterogeneous distribution of the yttrium is taken account for the excellent properties.

Journal

Journal of the Australian Ceramic SocietySpringer Journals

Published: May 11, 2020

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