Conversion of a precursor derived from cage-type and cyclic molecular building blocks into Al-Si-N-C ceramic composites

Hiroaki Nakashima, Seiichi Koyama, Kazuyuki Kuroda, Yoshiyuki Sugahara

    Research output: Contribution to journalArticle

    22 Citations (Scopus)

    Abstract

    A precursor derived from (HAlNiPr)m and [MeSi(H)NH]n, which mainly consisted of cage-type compounds and cyclic compounds, respectively, was converted into Al-Si-N-C ceramic composites via pyrolysis. A dehydrocoupling reaction between AlH groups and NH groups occurred at low temperatures (≤ ∼ 250°C), which mainly accounts for its high ceramic yield (69% up to 900°C). At high temperatures (≥ ∼ 250°C), the organic groups were decomposed. The product pyrolyzed at 1350° and 1500°C under Ar contained a 2H wurtzite-type compound and a β-Si3N4-type compound, while β-SiC was clearly detected in addition to these compounds in the product pyrolyzed at 1600°C under Ar. On the other hand, the product pyrolyzed at 800°C under NH3 and subsequently at 1350°C under N2 consisted of AlN and β-Sialon.

    Original languageEnglish
    Pages (from-to)59-64
    Number of pages6
    JournalJournal of the American Ceramic Society
    Volume85
    Issue number1
    Publication statusPublished - 2002 Jan

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    Composite materials
    Pyrolysis
    Temperature
    silicon nitride

    ASJC Scopus subject areas

    • Ceramics and Composites

    Cite this

    Conversion of a precursor derived from cage-type and cyclic molecular building blocks into Al-Si-N-C ceramic composites. / Nakashima, Hiroaki; Koyama, Seiichi; Kuroda, Kazuyuki; Sugahara, Yoshiyuki.

    In: Journal of the American Ceramic Society, Vol. 85, No. 1, 01.2002, p. 59-64.

    Research output: Contribution to journalArticle

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    AU - Koyama, Seiichi

    AU - Kuroda, Kazuyuki

    AU - Sugahara, Yoshiyuki

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