Mechanical and Thermal Properties of Hot-Pressed Compact of Si3 N4 Particles Coated with AIN by CVD

Kunio Shinohara, Hitoshi Abe, Boris Golman, Katsuyoshi Shimokawa, Shigeo Chiba

Research output: Contribution to journalArticlepeer-review

Abstract

Si3N4 fine particles were coated with AN by chemical vapor deposition reaction and then sintered under uniaxial pressure in a hot-press. The effect of coating quantity on the mechanical and thermal properties of composite compact was measured and the data were compared with those for Si3N4 itself. As a result, the flexural strength and heat conductivity of the composite samples went through maximum and the Vickers hardness slightly increased with the amount of AlN deposit. It was shown to be possible to obtain composite compacts with mechanical properties exceeding the corresponding properties of sam ples made of uncoated Si3N4 particles. The heat conductivity of composite sam ples did not change considerably in comparison with uncoated ones due to low amount of A1N deposit and its non-uniform distribution at high reaction temperature.

Original languageEnglish
Pages (from-to)178-187
Number of pages10
JournalInternational Journal of the Society of Materials Engineering for Resources
Volume7
Issue number1
DOIs
Publication statusPublished - Jan 1 1999

Keywords

  • Aluminum Nitride
  • CVD Coating
  • Heat Conductivity
  • Mechanical Properties
  • Silicon Nitride

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Mechanical Engineering

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