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
DOIs
Publication statusPublished - 2002 Jan

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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