Pyrolytic conversion of an Al-Si-N-C precursor prepared via hydrosilylation between [Me(H)SiNH]4 and [HAlN(alIyl)] m[HAlN(ethyl)]n

Yusuke Mori, Yoshiyuki Sugahara

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

An iminoalane-silazane polymer (ISP), an Al-Si-N-C precursor, has been synthesized via Ptcatalyzed hydrosilylation between poly(allyl iminoalane-co-ethyl iminoalane) ([HAlN(allyl)]m[HAlN (ethyl)] n, AE-alane) and l,3,5,7-tetrahydro-1,3,5,7-tetramethylcyclotetrasilazane {[Me(H)SiNH] 4, TCS}. The IR and 1H NMR spectra of ISP indicate that the relative amounts of the allyl groups decrease slightly in comparison with those of AE-alane, suggesting that hydrosilylation occurs partially. TG analysis up to 900 °C reveals that the ceramic yield of ISP is 83.1 mass%. It is suggested that the high ceramic yield can be ascribed to cross-linking reactions occurring during pyrolysis. Possible reactions during pyrolysis are hydrosilylation, polymerization of the C=C bonds in the allyl groups and dehydrocoupling among the SiH groups, NH groups and AlH groups in ISP. The pyrolyzed residue at 1700 °C contains crystalline AIN, 2H-SiC, β-SiC and β-Si3N4 and amorphous carbon, as revealed by solid-state nuclear magnetic resonance (NMR) spectroscopy, Raman spectroscopy and X-ray diffraction (XRD) analysis.

Original languageEnglish
Pages (from-to)527-534
Number of pages8
JournalApplied Organometallic Chemistry
Volume20
Issue number8
DOIs
Publication statusPublished - 2006 Aug 1

Keywords

  • Aluminum nitride
  • Ceramic-based composites
  • Hydrosilylation
  • Precursor
  • Pyrolysis
  • Silicon carbide
  • Solid-state nuclear magnetic resonance (NMR)

ASJC Scopus subject areas

  • Chemistry(all)
  • Inorganic Chemistry

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