Journal of Materials Science

, Volume 13, Issue 10, pp 2137–2146 | Cite as

Crystallization of grain boundary phases in hot-pressed silicon nitride materials

Part 1 Preparation and characterization of materials
  • J. E. Weston
  • P. L. Pratt
  • B. C. H. Steele
Papers

Abstract

Multicomponent oxide additions were used to replace magnesia as the densification aid for hot-pressing silicon nitride and silicon nitride-alumina materials. Crystallization of the silicate glass phases present after hot-pressing was encouraged by the use of an in situ heat treatment process. The phase constitutions of the materials produced by this method were determined using X-ray powder analysis. The kinetics of the densification of the silicon nitride materials were investigated, and these materials were examined using an X-ray diffractometer to study the textures produced by hot-pressing.

Keywords

Crystallization Magnesia Silicate Heat Treatment Nitride 

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Copyright information

© Chapman and Hall Ltd. 1978

Authors and Affiliations

  • J. E. Weston
    • 1
  • P. L. Pratt
    • 1
  • B. C. H. Steele
    • 1
  1. 1.Department of Metallurgy and Materials ScienceImperial College of Science and TechnologyLondonUK

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