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Processing of silicon carbide ceramics using chemically modified polycarbosilanes

Published online by Cambridge University Press:  26 July 2012

Sachiko Okuzaki ,
Yuji Iwamoto ,
Shinji Kondoh ,
Koichi Kikuta  and
Shin-ichi Hirano
Sachiko Okuzaki
Affiliation:
Fine Ceramics Research Association Synergy Ceramics Laboratory, 2-4-1 Mutsuno Atsuta-ku, Nagoya 456, Japan
Yuji Iwamoto
Affiliation:
Fine Ceramics Research Association Synergy Ceramics Laboratory, 2-4-1 Mutsuno Atsuta-ku, Nagoya 456, Japan
Shinji Kondoh
Affiliation:
Fine Ceramics Research Association Synergy Ceramics Laboratory, 2-4-1 Mutsuno Atsuta-ku, Nagoya 456, Japan
Koichi Kikuta
Affiliation:
National Industrial Research Institute of Nagoya, 1 Harate-cho, Kita-ku, Nagoya 462, Japan
Shin-ichi Hirano
Affiliation:
Department of Applied Chemistry, School of Engineering, Nagoya University, 1 Furo-cho, Chikusa-ku, Nagoya 464-01, Japan
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Extract

Chemically modified polycarbosilane (PC) which contains Si–Al–C–O component, PCOAl, was synthesized using PC and aluminum triisopropoxide. Ceramic yield was greatly improved through the modification of PC with a metal alkoxide. The phase transformation behavior and microstructure development of silicon carbide (SiC) were studied on β–SiC powders coated with chemically modified PC. The β-α phase transformation of SiC was enhanced by the coating of chemically modified PC on β–SiC powder. A unique microstructure with submicron-sized plate-like grains was developed, since the fine a phase produced at low temperature served as a nucleation site for the β-α phase transformation of SiC.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 1 , January 1999 , pp. 189 - 195
Copyright
Copyright © Materials Research Society 1999

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