Grain-boundary atomic structures in zirconia ceramics

Naoya Shibata, Fumiyasu Oba, Takahisa Yamamoto, Yuichi Ikuhara

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    In this paper, we review our systematic grain-boundary studies ofzirconia ceramics using bicrystals. Yttria-stabilized cubic zirconia (YSZ) bicrystals with [110] symmetric tilt grain boundaries are systematically fabricated by diffusion bonding method. It is revealed that the grain-boundary atomistic structures are strongly dependent on the macroscopic geometries of the boundaries. High-resolution transmission electron microscopy (HRTEM) combined with lattice statics calculations suggest that the grain-boundary structures are characterized by the accumulation of coordination deficient cation sites at their cores, whose densities have a clear correlation with their excess energies and amounts of yttrium solute segregation. The orientation dependence of grain-boundary properties in cubic zirconia can be thus linked and understood via local grain-boundary atomistic structures with the characteristic miscoordinated cation sites. These unique sites will be used to discuss the differences in energies and solute segregation behaviors with fee metal grain boundaries.

    Original languageEnglish
    Title of host publicationMechanical Properties and Performance of Engineering Ceramics and Composites II - A Collection of Papers Presented at the 30th International Conference on Advanced Ceramics and Composites
    Pages171-181
    Number of pages11
    Edition2
    Publication statusPublished - 2006 Dec 1
    EventMechanical Properties and Performance of Engineering Ceramics and Composites Symposium - 30th International Conference on Advanced Ceramics and Composites - Cocoa Beach, FL, United States
    Duration: 2006 Jan 222006 Jan 27

    Publication series

    NameCeramic Engineering and Science Proceedings
    Number2
    Volume27
    ISSN (Print)0196-6219

    Other

    OtherMechanical Properties and Performance of Engineering Ceramics and Composites Symposium - 30th International Conference on Advanced Ceramics and Composites
    CountryUnited States
    CityCocoa Beach, FL
    Period06/1/2206/1/27

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Materials Chemistry

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