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

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

doi:10.4028/www.scientific.net/kem.317-318.649

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 journal › Article › peer-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 language	English
Pages (from-to)	649-652
Number of pages	4
Journal	Key Engineering Materials
Volume	317-318
DOIs	https://doi.org/10.4028/www.scientific.net/kem.317-318.649
Publication status	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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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.",

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AU - Mogan, P. E.D.

AU - Niihara, K.

PY - 2006

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AB - 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.

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