Effect of platelet orientation on the properties of alumina platelet zirconia matrix composites

O. Toft Sørensen, W.-Y. Li

    Research output: Contribution to journalJournal articleResearch

    Abstract

    Platelet alignment in Al2O3pl - TZ3YS composites formed by injection moulding, slip casting, and tape casting, has been examined. Mechanical properties have been determined in terms of flexural strength and fracture toughness, with respect to materials formed by different techniques, and to the platelet orientation. Materials produced by injection moulding exhibited fewer and smaller internal defects, compared to the slip casting and tape casting, thus giving rise to the maximum average strength. The fracture toughness showed more increase for samples with stronger textures, ie. platelet alignment. The results also indicated that there was a trend of higher K-IC value when cracks were propagating parallel to the platelet surface (nor delamination). Thermal shock resistance of the injection moulded composite has been characterized by water quench test. Delta T-c for the composite was between 220 and 300 degrees C, which is approximately in the same range as for the matrix.
    Original languageEnglish
    JournalSilicates Industriels
    Volume61
    Issue number11-12
    Pages (from-to)243-247
    ISSN0037-5225
    Publication statusPublished - 1996

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