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    Indentation Responses of Functionally-Graded Al2TiO5-Based Ceramics

    Access Status
    Fulltext not available
    Authors
    Oo, Zeya
    Low, It-Meng (Jim)
    Date
    2011
    Type
    Journal Article
    
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    Citation
    Oo, Z. and Low, I.M. 2011. Indentation Responses of Functionally-Graded Al2TiO5-Based Ceramics. Advanced Materials Research. 239-242: pp. 171-174.
    Source Title
    Advanced Materials Research
    DOI
    10.4028/www.scientific.net/AMR.239-242.171
    ISSN
    10226680
    School
    Department of Imaging and Applied Physics
    URI
    http://hdl.handle.net/20.500.11937/44527
    Collection
    • Curtin Research Publications
    Abstract

    Aluminium titanate, Al2TiO5 (AT) with the pseudobrookite structure is the only compound in the alumina-titania system. It is an excellent refractory and thermal shock resistant material due to its relatively low thermal expansion coefficient (1 ×10-6 ºC –1) and high melting point (1860ºC). However, its low mechanical strength, hardness and fracture resistance together with susceptibility to decomposition in the temperature range 900–1200ºC has limited its wider application. In this paper, the innovative tailored design of functionally- graded Al2TiO5 – based ceramics system was presented. This involves the use of a vacuum heat-treatment or die-pressing to form hard graded layers of alumina on Al2TiO5. These hard outer layers will provide hardness and wear resistance to protect the softer but damage resistant underlayers. The results will also explore unresolved issues concerning the effect of graded interfaces on their physical and mechanical performance properties.

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