Fracture Toughness of Al2O3-Particle-Dispersed Y2O3-Partially Stabilized Zirconia |
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| Authors: | Jing-Feng Li Ryuzo Watanabe |
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| Affiliation: | Department of Materials Processing, Faculty of Engineering, Tohoku University, Sendai 980 Japan |
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| Abstract: | The fracture toughness of 3 mol% Y2O3-ZrO2 (3Y-PSZ) composites containing 10–30 vol% Al2O3 with different particle sizes was investigated. It was found that Al2O3 dispersion of up to 30 vol% increased the fracture toughness by 17% to 30%, and the toughness increase was more remarkable in the composite dispersed with Al2O3 particles of larger sizes. By combining the effects of the dispersion toughening and phase transformation toughening, the toughness change in the present materials was theoretically predicted, which was in good agreement with the experimental data. |
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