Phase Relations in the Si3N4‐Rich Portion of the Si3N4–AlN–Al2O3–Y2O3

Mlkio Jfukuhara

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4 Citations (Scopus)


The phase relations in the Si3N4‐rich portion of the Si3N4–AlN–Y2O3 rystem were investigated using hot‐pressed bodies. The one‐phase fields of β3 and α, the twophase fields of β+α, β+M (M=melilite), and α+M, and the three‐phase fields of β+α+M were observed in the Si3N4‐rich portion. The α‐ and β‐sialons are not two different compounds but an allotropic transformation phase of the Si–Al–O–N system, and an α solid solution expands and stabilizes with increasing Y2O3 content. Therefore, the formulas of the two sialons should be the same.

Original languageEnglish
Pages (from-to)C‐359-C‐361
JournalJournal of the American Ceramic Society
Issue number7
Publication statusPublished - 1988 Jul

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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