Effects of agitation and morphology of primary crystalline phase on crystallization behavior of CaO-SiO2-CaF2supercooled melts

Yusuke Harada, Kakeru Kusada, Sohei Sukenaga, Hideaki Yamamura, Yoshiyuki Ueshima, Toshiaki Mizoguchi, Noritaka Saito, Kunihiko Nakashima

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    Abstract

    The effects of the agitation field and the crystal morphology on the primary and secondary crystallization temperatures of CaO-SiO2-CaF2supercooled melts were systematically investigated by measuring the electrical capacitance. Two-stage decreases in electrical capacitance were observed for most samples investigated. These stages correspond to the primary crystallization and the eutectic reaction resulting from the compositional change in the supercooled melts associated with the primary crystallization, respectively. The primary crystallization of dendritic CaO•SiO2was affected by the agitation in the same manner as reported previously, but the crystallization of faceted 3CaO•2SiO2•CaF2revealed little dependence on the agitation. This indicates that the effects of the agitation are different for different morphologies of the primary crystalline phase because of shifts in the rate-determining step of crystallization.

    Original languageEnglish
    Pages (from-to)2071-2076
    Number of pages6
    JournalIsij International
    Volume54
    Issue number9
    DOIs
    Publication statusPublished - 2014

    Keywords

    • Agitation
    • Electrical capacitance
    • Morphology
    • Oxyfluoride
    • Primary crystallization

    ASJC Scopus subject areas

    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

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