Flexural Strength of Superfine Grained Si2N2O-Si3N4 Composites

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The Si3N4- Si2N2O composites were fabricated with amorphous nano-sized silicon nitride powders by the liquid phase sintering(LPS) method. The sintering temperatures ranged from 1500°C to 1700°C. Microstructure and component of the composites were performed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Results show that sintered body consists of Si2N2O and β-Si3N4, with an average grain size about 1μm. The maximum value of flexural strength of the material is 680MPa when sintered at 1700°C. Transcrystalline cracking is the main fracture mechanism of the composites.

Info:

Periodical:

Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie

Pages:

1477-1480

DOI:

10.4028/www.scientific.net/KEM.353-358.1477

Citation:

J. T. Luo et al., "Flexural Strength of Superfine Grained Si2N2O-Si3N4 Composites", Key Engineering Materials, Vols. 353-358, pp. 1477-1480, 2007

Online since:

September 2007

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$35.00

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