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

Yusuke Mori; Takeshi Ueda; Satoshi Kitaoka; Yoshiyuki Sugahara

doi:10.2109/jcersj.114.497

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

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

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	497-501
Number of pages	5
Journal	Journal of the Ceramic Society of Japan
Volume	114
Issue number	1330
DOIs	https://doi.org/10.2109/jcersj.114.497
Publication status	Published - 2006 Jun

Keywords

Aluminum nitride
Ceramic-based composites
Polysilazane
Precursors
Silicon carbide

ASJC Scopus subject areas

Ceramics and Composites
Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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title = "Preparation of Si-Al-N-C ceramic composites by pyrolysis of blended precursors",

abstract = "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.",

keywords = "Aluminum nitride, Ceramic-based composites, Polysilazane, Precursors, Silicon carbide",

author = "Yusuke Mori and Takeshi Ueda and Satoshi Kitaoka and Yoshiyuki Sugahara",

year = "2006",

month = jun,

doi = "10.2109/jcersj.114.497",

language = "English",

volume = "114",

pages = "497--501",

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T1 - Preparation of Si-Al-N-C ceramic composites by pyrolysis of blended precursors

AU - Mori, Yusuke

AU - Ueda, Takeshi

AU - Kitaoka, Satoshi

AU - Sugahara, Yoshiyuki

PY - 2006/6

Y1 - 2006/6

N2 - 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.

AB - 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.

KW - Aluminum nitride

KW - Ceramic-based composites

KW - Polysilazane

KW - Precursors

KW - Silicon carbide

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ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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