Liquid Phase Sintering of α-Si3N4 by Spark Plasma Sintering

Abstract:

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In this study, spark plasma sintering (SPS) was applied to prepare α-Si3N4 ceramics of different densities with magnesia, silicon dioxide, alumina as the sintering aids. The sintering behavior and liquid phase sintering (LPS) mechanism were discussed and the factors influencing the density of the prepared samples were analyzed. Microstructures of sintered samples were observed and the phase compositions were analyzed. The results showed that α-Si3N4 ceramics can be sintered by SPS based on the reaction among α-Si3N4 and sintering additives which lead to the liquid phase and the density can be well controlled from 2.48 to 3.09 g/cm3 while the content of the sintering aids changes from 10% to 28.5% and sintering temperature from 1400°C to 1500°C.

Info:

Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1062-1064

DOI:

10.4028/www.scientific.net/KEM.336-338.1062

Citation:

F. Q. Yan et al., "Liquid Phase Sintering of α-Si3N4 by Spark Plasma Sintering", Key Engineering Materials, Vols. 336-338, pp. 1062-1064, 2007

Online since:

April 2007

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Price:

$35.00

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