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

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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.

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Funding

This research was funded by the National Key R&D Program of China (Grants No. 2017YFB0703200) and 2016 Year YangFan Innovative & Entrepreneurial Research Team Project of Guangdong Province of China (Grants No. 2016YT03C025).

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Authors and Affiliations

  1. School of Materials Science and Engineering, South China University of Technology, Wushan Road, Guangzhou, 510640, People’s Republic of China

    Jinping Cui, Wei Zhao, Kang Guan & Pinggen Rao

  2. Chemical Engineering and Modern Materials School, Shangluo University, Shangluo, 72600, People’s Republic of China

    Wei Zhao

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  1. Jinping Cui
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  2. Wei Zhao
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  4. Pinggen Rao
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Correspondence to Pinggen Rao.

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Cui, J., Zhao, W., Guan, K. et al. Evaluation of fracture toughness of zirconia ceramics with heterogeneous yttrium distribution microstructures. J Aust Ceram Soc 56, 1229–1235 (2020). https://doi.org/10.1007/s41779-020-00474-0

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  • DOI: https://doi.org/10.1007/s41779-020-00474-0

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