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Microstructure and thermal shock resistance of Al2O3 fiber/ZrO2 and SiC fiber/ZrO2 composites fabricated by hot pressing

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Abstract

Al2O3 chopped fiber/ZrO2 and SiC continuous fiber/ZrO2 composites were fabricated by hot pressing at 1550°C and 15 MPa in vacuum. The mechanical properties of thermally shocked composites were measured at room temperature by four-point bending. The addition of Al2O3 fibers into ZrO2 matrix degraded the fracture strength, but improved significantly the thermal shock resistance. In addition, the mechanical properties of SiC fiber/ZrO2 composites were much lower than those of monolithic ZrO2 because of the presence of microcracks on the surface. The SiC fiber/ZrO2 composites showed an excellent thermal shock resistance.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Chung-Ju National University, Chungju, 380-702, Korea

    K. Park

  2. Department of Chemical and Nuclear Engineering, University of Massachusetts, Lowell, MA, 01854, USA

    T. Vasilos

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  1. K. Park
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  2. T. Vasilos
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Park, K., Vasilos, T. Microstructure and thermal shock resistance of Al2O3 fiber/ZrO2 and SiC fiber/ZrO2 composites fabricated by hot pressing. Journal of Materials Science 34, 2837–2842 (1999). https://doi.org/10.1023/A:1004675132767

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  • DOI: https://doi.org/10.1023/A:1004675132767

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