Formation of TiB particles during reaction sintering in a TiB/Ti composite

Tatsuaki Yoshihiro, Toshihiro Tsuchiyama, Setsuo Takaki

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    2 Citations (Scopus)


    Chemical reaction process (Ti+CrB→Cr+TiB) of isolated CrB particle in a Ti powder compact was investigated to find a proper sintering condition for producing TiB/Ti composites by reaction sintering. EPMA analysis revealed that the formation of TiB starts at 1223 K during heated with the rate of 0.17 K/s. The reaction proceeds topochemically with the movement of a reaction band from the particle surface to inside. The unreacted-core model was applied to the reaction of a CrB particle for the analyse the reaction rate of CrB particle. It was found that diffusion of Ti and Cr atoms in a TiB layer controls the whole reaction rate, and then the time of reaction finish at 1223 K was estimated as a function of initial CrB particle radius.

    Original languageEnglish
    Pages (from-to)362-367
    Number of pages6
    JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
    Issue number7
    Publication statusPublished - Jul 2003

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Mechanics of Materials
    • Metals and Alloys
    • Materials Chemistry


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