Processing of nanocomposite silicon nitride-mullite-alumina by reaction sintering

Y. Sakka, Ilhan A. Aksay

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We describe a new method for processing Si3N4mulliteAl2O3 nanocomposites by reaction sintering of the green compacts after partial oxidation treatment. Bimodal powder compacts used in this process were prepared by a colloidal filtration method. Si3N4 and Al2O3 powders were dispersed in aqueous suspensions at pH=10 with the aid of an electrosteric stabilizer, polymethacrylic acid. A binary mixture of Al2O3 powder was used to attain high green densities. This process results in the following morphology: nanometer-sized Si3N4 particles that are distributed in the mullite phase which is embedded in an Al2O3 matrix.

Original languageEnglish (US)
Pages (from-to)169-182
Number of pages14
JournalNanostructured Materials
Volume4
Issue number2
DOIs
StatePublished - Jan 1 1994

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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