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Mechanical properties of Al2O3 particle-Y-TZP matrix composite and its toughening mechanism

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Abstract

Dense Al2O3 particle-Y-TZP matrix (Al2O3<40 vol%) composite was prepared by pressureless sintering at 1550°C. Composites with 10–30 vol% Al2O3 particles showed enhanced fracture toughness, bending strength and Vicker's hardness as compared to single-phase Y-TZP. The highest strength (1150 MPa) and highest toughness (12.4 MPa m1/2) were obtained for the composite containing 10 vol% Al2O3. It was found that, in addition to the contribution by the crack-deflection effect, the enhanced phase transformation from tetragonal to monoclinic during fracture was the main toughening mechanism in operation in the composites.

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Authors and Affiliations

  1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, People’s Republic of China

    J. L. Shi, B. S. Li & T. S. Yen

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  1. J. L. Shi
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  2. B. S. Li
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  3. T. S. Yen
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Shi, J.L., Li, B.S. & Yen, T.S. Mechanical properties of Al2O3 particle-Y-TZP matrix composite and its toughening mechanism. JOURNAL OF MATERIALS SCIENCE 28, 4019–4022 (1993). https://doi.org/10.1007/BF00351224

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