Effect of oxynitride grain boundary phase on toughening of silicon nitride ceramics

T. Kusunose, T. Sekino, P. E.D. Mogan, K. Niihara

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The Si3N4/YSiO2N composite in which crystalline YSiO2N was formed as grain boundary phase was fabricated by hot-pressing the mixture of SiO2, Si3N4 and Y2O3. The fracture toughness of this composite was significantly improved, compared to the Si3N4 composites containing Y5Si3O12N or Y2Si 3O3N4 as a grain boundary phases. To clarify the toughening mechanism, the microstructure and the crack propagation profiles were observed.

Original languageEnglish
Pages (from-to)649-652
Number of pages4
JournalKey Engineering Materials
Volume317-318
DOIs
Publication statusPublished - 2006
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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