Preparation of Si-Al-N-C ceramic composites by pyrolysis of blended precursors

Yusuke Mori*, Takeshi Ueda, Satoshi Kitaoka, Yoshiyuki Sugahara

*この研究の対応する著者

研究成果: Article査読

11 被引用数 (Scopus)

抄録

Si-Al-N-C precursors have been prepared from perhydropolysilazane (PHPS) and cage-type poly (ethyliminoalane) [(HAlNEt)n; PEIA, n is mainly 8] with different Si/Al molar ratios (Si/Al-3, 1, 1/3). Spectroscopic analysis indicates that essentially no Si-N-Al linkages form, indicating that the precursors are blended polymers. TG analysis reveals that the ceramic yields of the blended precursors up to 900°C are higher than those of PHPS and (HAlNEt)n, suggesting that cross-linking reactions occur during pyrolysis. Possible reactions are dehydro-coupling and radical reactions, as suggested by the results of solid-state nuclear magnetic resonance (NMR) spectroscopy. The results of solid-state NMR spectroscopy and X-ray diffraction (XRD) analysis indicate that the residue pyrolyzed at 1600°C contains mainly crystalline AlN, 2H-SiC and β-SiC.

本文言語English
ページ(範囲)497-501
ページ数5
ジャーナルJournal of the Ceramic Society of Japan
114
1330
DOI
出版ステータスPublished - 2006 6月

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

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