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

Shiro Shimada, Anongsack Paseuth, Hajime Kiyono

Research output: Contribution to journalArticle

1 Citation (Scopus)

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-C3H 7)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/Al 2O3 particles at 1500°C and 1600°C yielded the composite ceramics with a relative density of 94-97%. Composite TiN/Al 2O3 ceramics with an electrical resistivity of ∼10-2 Ω. cm were obtained at 25 vol% TiN composition.

Original languageEnglish
Pages (from-to)47-51
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume117
Issue number1361
DOIs
Publication statusPublished - 2009 Jan

Keywords

  • Alumina
  • Coating
  • Composites
  • Nano-sized TiN
  • Spark plasma sintering

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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