The Intergranular Phase in Hot‐Pressed Silicon Nitride: II, Evidence for Phase Separation and Crystallization

D. R. CLARKE, N. J. ZALUZEC, Ray Carpenter

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Abstract

Compositional and morphological evidence obtained using transmission electron microscopy is presented indicating that the noncrystalline phase in a hot‐pressed silicon nitride can undergo phase separation. The compositional range determined for the phase separation is close to the known miscibility gap in the pseudobinary system SiO2‐MgO. Crystallization of Si2N2O and MgSiO3 from the noncrystalline phase is also evident, suggesting that it can contain some dissolved nitrogen and that the intergranular phase may be crystallizable.

Original languageEnglish (US)
Pages (from-to)608-611
Number of pages4
JournalJournal of the American Ceramic Society
Volume64
Issue number10
DOIs
StatePublished - 1981
Externally publishedYes

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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