Effect of Oxynitride Grain Boundary Phase on Toughening of Silicon Nitride Ceramics

Abstract:

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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 Y2Si3O3N4 as a grain boundary phases. To clarify the toughening mechanism, the microstructure and the crack propagation profiles were observed.

Info:

Periodical:

Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara

Pages:

649-652

DOI:

10.4028/www.scientific.net/KEM.317-318.649

Citation:

T. Kusunose et al., "Effect of Oxynitride Grain Boundary Phase on Toughening of Silicon Nitride Ceramics", Key Engineering Materials, Vols. 317-318, pp. 649-652, 2006

Online since:

August 2006

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Price:

$35.00

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