The effect of preparation route and nitrogen content on properties of Y- SiAlON glasses

E. Dolekcekic, M. J. Pomeroy, S. Hampshire

Research output: Contribution to journalConference articlepeer-review

Abstract

Glasses of composition Y:Si:Al = 3.45:3:2 cation ratio containing various amounts of nitrogen (N = 5, 8, 15 and 22 e/o) were prepared by ball milling powders in alcohol and also by an environmentally friendly aqueous route. For all properties studied (density, glass transition temperature, microhardness and Young's modulus) values for water processed compositions were slightly lower than the values for alcohol processed compositions, because of less rigid bonding in water processed glasses. The reason for lower rigidity may be lower nitrogen contents than for equivalent alcohol processed glasses or the replacement of some bridging oxygens with =Si-OH terminations due to the water-based processing of these glasses. Further work is necessary to determine which of these effects control glass properties and structure.

Original languageEnglish
Pages (from-to)1927-1930
Number of pages4
JournalKey Engineering Materials
Volume264-268
Issue numberIII
Publication statusPublished - 2004
EventProceedings of the 8th Conference and Exhibition of the European Ceramic Society - Istanbul, Turkey
Duration: 29 Jun 20033 Jul 2003

Keywords

  • Hardness
  • Sialon Glass
  • T
  • Young's Modulus

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