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Hydrothermal stability of yttria- and ceria-doped tetragonal zirconia-alumina composites

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Abstract

Changes in the crystalline phase and microstructure resulting from hydrothermal ageing of Y-TZP, (Y,Ce)-TZP, Y-TZP-Al2O3 composites and (Y,Ce)-TZP-Al2O3 composites were investigated under hydrothermal conditions at 180 °C and 1 MPa. Although (Y,Ce)-TZP showed no tetragonal-to-monoclinic (t→m) phase transformation during low-temperature ageing in air as compared with 3Y-TZP, the tetragonal phase of (Y,Ce)-TZP easily transformed to monoclinic phase by ageing under hydrothermal condition. This t→m phase transformation invaded the inside of the body accompanied by microcracks. (Y,Ce)-TZP-Al2O3 composites were resistant to phase transformation during hydrothermal ageing.

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  1. Noritake Co. Ltd, Noritake, Nishi-ku, Nagoya-shi, Japan

    Masanori Hirano & Hiroshi Inada

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  1. Masanori Hirano
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  2. Hiroshi Inada
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Hirano, M., Inada, H. Hydrothermal stability of yttria- and ceria-doped tetragonal zirconia-alumina composites. J Mater Sci 26, 5047–5052 (1991). https://doi.org/10.1007/BF00549890

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