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

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概要

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• TiN-coated Al_2O_3 particles of different size, shape and crystal structure were prepared by depositing nano-size TiO_2 on the Al_2O_3 surfaces from Ti(O-i-C_3H_7)_4 solution (TiO_2 precursor) by controlled hydrolysis, then nitrided with NH_3 at 1000℃. Irrespective of the source of Al_2O_3 particles, a homogeneous TiO_2 coating was achieved by heating from 10 to 40℃ an ultrasonic suspension of the Al_2O_3 particles containing the precursor with 1.0vol% H_2O. After nitridation, the Al_2O_3 grains were coated with 10-20nm TiN particles. Spark plasma sintering of the TiN/Al_2O_3 particles at 1500℃ and 1600℃ yielded the composite ceramics with a relative density of 94-97%. Composite TiN/Al_2O_3 ceramics with an electrical resistivity of 〜10^<-2>Ωcm were obtained at 25vol% TiN composition.

• 社団法人日本セラミックス協会の論文
• 2009-01-01

著者

• Kiyono Hajime

  Graduate School Of Engineering Hokkaido Univ.

• Kiyono Hajime

  Graduate School Of Engineering Hokkaido University

• Shimada Shiro

  Graduate School Of Engineering Hokkaido Univ.

• PASEUTH Anongsack

  Graduate School of Engineering, Hokkaido University

• Paseuth Anongsack

  Graduate School Of Engineering Hokkaido University

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