Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
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Coating and spark plasma sintering of nano-sized TiN on alumina particles of different size, shape and structure
Shiro SHIMADAAnongsack PASEUTHHajime KIYONO
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2009 Volume 117 Issue 1361 Pages 47-51

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Abstract

TiN-coated Al2O3 particles of different size, shape and crystal structure were prepared by depositing nano-size TiO2 on the Al2O3 surfaces from Ti(O-i-C3H7)4 solution (TiO2 precursor) by controlled hydrolysis, then nitrided with NH3 at 1000°C. Irrespective of the source of Al2O3 particles, a homogeneous TiO2 coating was achieved by heating from 10 to 40°C an ultrasonic suspension of the Al2O3 particles containing the precursor with 1.0 vol% H2O. After nitridation, the Al2O3 grains were coated with 10-20 nm TiN particles. Spark plasma sintering of the TiN/Al2O3 particles at 1500°C and 1600°C yielded the composite ceramics with a relative density of 94-97%. Composite TiN/Al2O3 ceramics with an electrical resistivity of ∼10-2 Ω cm were obtained at 25 vol% TiN composition.

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© 2009 The Ceramic Society of Japan
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