Synthesis of SiC-AlN ceramic alloy by reaction sintering and its HIP-densification

Li Jing-Feng, Ryuzo Watanabe, Akira Kawasaki

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2 Citations (Scopus)

Abstract

Ceramic alloys were synthesized by reaction sintering and densified by HIP in the temperature range of 2070 to 2120K under a pressure of 200MPa. The starting powders were commerical silicon nitride, aluminium nitride and graphite powders. A small amount of calcia was added in the form of Ca(NO3)2·4H2O, and the reaction sintering was performed in a nitrogen atmosphere in the temperature range of 1670 to 2170K. The reaction process was investigated by X-ray diffraction analysis and found to be consisted of two steps: the formation of α-sialon and its carbothermal reduction. When AIN content was less than 35mol%, a uniform 2HSiC-AIN solid solution was formed with fine grain size of about one-third of that of the strating powders. On the other hand, when more AIN powders was added, two-phase composite was formed. Complete densification of the synthesized compact was attained by HIP treatment.

Original languageEnglish
Pages (from-to)740-745
Number of pages6
Journaljournal of the japan society of powder and powder metallurgy
Volume36
Issue number6
DOIs
Publication statusPublished - 1989

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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