Pore Independent Crack Propagation of Glass-Alumina Functionally Graded Materials

    Volume 39, Issue 2 (March 2011)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 23 September 2010

    Page Count: 6


    Cheng-Long, Yu
    School of Materials Science and Engineering, Shaanxi Univ. of Science and TechnologyResearch Laboratory of Hydrothermal Chemistry, Faculty of Science, Kochi Univ., Xi’anKochi,

    Hong-Tao, Jiang
    School of Materials Science and Engineering, Shaanxi Univ. of Science and Technology, Xi’an,

    Li-Li, Wang
    School of Materials Science and Engineering, Shaanxi Univ. of Science and Technology, Xi’an,

    (Received 8 February 2010; accepted 8 August 2010)

    Abstract

    Crack propagation of glass-alumina functionally graded materials prepared by a novel freeform fabrication method was investigated. Pores were intentionally introduced by partial decomposition of poly vinyl alcohol gel. Preferential distribution of pores adjacent the alumina particles is confirmed due to the integrated liquid-phase sintering process, especially the migration of the activated alumina interfaces towards the equilibrium state. Crack propagation and distribution were directly observed by scanning electron microscopy. Cracks propagate through the weakly bonded interfaces which finally cause the glass matrix to fracture. However, pores have little effect on the crack propagation.


    Paper ID: JTE103037

    DOI: 10.1520/JTE103037

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    Author
    Title Pore Independent Crack Propagation of Glass-Alumina Functionally Graded Materials
    Symposium , 0000-00-00
    Committee D30