A modern approach to control grain boundaries in ceramics

Taketo Sakuma, Yuich Ikuhara, Takahisa Yamamoto

    Research output: Contribution to journalConference article

    Abstract

    It is critically important to control grain boundaries in ceramics. In classical sense of grain boundary engineering, the choice of sintering aid, grain boundary wetting by liquid phase, grain boundary crystallization etc. are the key technologies to fabricate commercial ceramics, and such basic techniques to control grain boundary phases are still common in tailoring engineering and functional ceramics. However, sintering in solid state becomes more important than before, in particular, in high-performance oxide ceramics because high-purity raw powders are available in recent years by the advancement of powder processing techniques. In such modern ceramics, various properties are very sensitive to a small doping of cation, which segregates in grain boundaries. To understand the small dopant effect, we need a knowledge of the change in local bonding state in grain boundaries with segregation. In this paper, our several trials to control grain boundary structure and chemistry ceramics in modern high-performance oxide will briefly be introduced.

    Original languageEnglish
    Pages (from-to)557-566
    Number of pages10
    JournalMaterials Science Forum
    Volume467-470
    Issue numberI
    DOIs
    Publication statusPublished - 2004
    EventProceedings of the Second Joint International Conferences on Recrystallization and Grain Growth, ReX and GG2, SF2M - Annecy, France
    Duration: 2004 Aug 302004 Sep 3

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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