Sintering and Mechanical Properties of Yttria‐Doped Tetragonal ZrO2 Polycrystal/Mullite Composites

Masayuki Ishitsuka, Tsugio Sato, Tadashi Endo, Masahiko Shimada

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    25 Citations (Scopus)


    Yttria‐doped tetragonal ZrO2 polycrystal (Y‐TZP)lmullite composites were sintered at 1450° to 1500°C in air to disperse rodlike mullite grains at the grain boundary of Y‐TZP and the mechanical and thermal properties were investigated. The aspect ratios of mullite grain were >2. High fracture strength of 1000 MPa and fracture toughness of 12 MPa·m1/2 were obtained by dispersing <20 vol% of mullite into Y‐TZP. The thermal expansion coefficient of Y‐TZP/mullite composites decreased with increasing mullite content. The thermal shock resistance of Y‐TZP was greatly improved by dispersion of rodlike mullite grains.

    Original languageEnglish
    Pages (from-to)C‐342-C‐346
    JournalJournal of the American Ceramic Society
    Issue number11
    Publication statusPublished - 1987 Nov

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Materials Chemistry


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