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    Characterization of thermal stability, microstructures and properties of Al2TiO5 - and Ti3SiC2- based ceramics

    199672_Oo 2014.pdf (15.31Mb)
    Access Status
    Open access
    Authors
    Oo, Zeya
    Date
    2013
    Supervisor
    Prof. Brian Henry O'Connor
    Prof. It-Meng (Jim) Low
    Type
    Thesis
    Award
    PhD
    
    Metadata
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    Faculty
    Faculty of Science, Department of Imaging and Applied Physics
    URI
    http://hdl.handle.net/20.500.11937/2514
    Collection
    • Curtin Theses
    Abstract

    The focus of this thesis was to study the thermal stability of Al2TiO5- and Ti3SiC2-based ceramics, and the oxidation characteristics of Ti3SiC2 through in-situ x-ray and neutron diffraction. The decomposition behaviour of Al2TiO5 in controlled atmospheres was studied in the temperature range of 20–1400°C. Al2TiO5 decomposed at 1100°C but reformed at 1350°C. In vacuum or argon, Ti3SiC2 decomposed to TiCx and Ti5Si3Cx above 1200°C. In air, Ti3SiC2 oxidized to anatase at 600°C, and formed an outer layer of rutile at 750°C and an inner mixed layer of rutile and cristobalite at 1350°C. Tridymite formed during cooling from 1350°C to room temperature.

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