Journal of Materials Science

, Volume 20, Issue 2, pp 381–390 | Cite as

Influence of the intergranular microstructure of substituted nitrides on high temperature strength

  • J. Y. Laval
  • C. Delamarre
  • M. C. Amamra
  • D. Broussaud
Article

Abstract

The relationships between the intergranular structure of substituted silicon nitrides and their high temperature strength have been considered. It has been shown that four types of intergranular structure can be distinguished. These structures depend on the nature and amount of additives. Analytical electron microscopy (X-ray microanalysis, microdiffraction and electron-induced processes) enables a precise characterization of these structures. If an extended glassy phase always appears to be detrimental, it has been shown that a thin glassy film may improve the high temperature strength and the cutting life of sialon tools and may at least be a fair compromise to obtain dense and homogeneous hot-pressed silicon nitrides.

Keywords

Polymer Microstructure Electron Microscopy Nitrides Silicon Nitrides 

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Copyright information

© Chapman and Hall Ltd 1985

Authors and Affiliations

  • J. Y. Laval
    • 1
  • C. Delamarre
    • 1
  • M. C. Amamra
    • 1
  • D. Broussaud
    • 2
  1. 1.Laboratoire de Chimie et Microstructure du Solide Minéral - ERA 912CNRS-ESPCIParis Cedex 05France
  2. 2.Centre des MatériauxEvry CedexFrance

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