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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.117  No.1361 (January) (2009)  >  pp.47-51

Journal of the Ceramic Society of Japan
<<Previous article Vol.117  No.1361 (January) (2009)   pp.47 - 51 Next article>>

Coating and spark plasma sintering of nano-sized TiN on alumina particles of different size, shape and structure

Shiro SHIMADA1), Anongsack PASEUTH1) and Hajime KIYONO1)
1) Graduate School of Engineering, Hokkaido University

  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.


Keyword:
Coating, Spark plasma sintering, Nano-sized TiN, Alumina, Composites

Received: August 20, 2008
Accepted: October 16, 2008 , Published online: January 01, 2009
Copyright (c) 2009 The Ceramic Society of Japan

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