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Si3N4–TiN–Y2O3 ceramics derived from chemically modified perhydropolysilazane

Published online by Cambridge University Press:  31 January 2011

Yuji Iwamoto ,
Ko-ichi Kikuta  and
Shin-ichi Hirano
Yuji Iwamoto
Affiliation:
Fine Ceramics Research Association, Synergy Ceramics Laboratory, 2-4-1 Mutsuno, Atsuta-ku, Nagoya 456–8587, Japan
Ko-ichi Kikuta
Affiliation:
Graduate School of Engineering, Nagoya University, 1 Furo-cho, Chikusa-ku, Nagoya 464–8603, Japan
Shin-ichi Hirano
Affiliation:
Graduate School of Engineering, Nagoya University, 1 Furo-cho, Chikusa-ku, Nagoya 464–8603, Japan
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Abstract

[Si–Y–Ti–O–C–N] multicomponent powders were synthesized by pyrolysis at 1000 °C, in NH3 flow, of chemically modified perhydropolysilazane using yttrium triisopropoxide and titanium tetrachloride. [Si–Y–Ti–O–C–N] powders yielded uniform and fine-grained Si3N4–TiN–Y2O3 ceramics by heat treatment at 1800 °C in N2. The fully densified Si3N4–TiN–Y2O3 ceramics were also synthesized by heat treatment at 1800 °C, followed by powder-vehicle hot pressing at 1800 °C in N2. The resulting ceramics revealed that TiN was dispersed as particles having a size range of about 60–600 nm and the fine particles less than 80 nm were dispersed within the β–Si3N4 matrix grains.

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Articles
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Journal of Materials Research , Volume 14 , Issue 11 , November 1999 , pp. 4294 - 4301
Copyright
Copyright © Materials Research Society 1999

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