Silicon nitride structural ceramics with an elevated strength at 1300°C

Silicon nitride structural ceramics with an elevated strength at 1300°C A high-temperature ceramics based on Si3N4 with an ultimate bending strength of 620 MPa at room temperature and 450 MPa at 1300°C has been developed using hot pressure casting and compression sintering. The ceramics is characterized by a high degree of crystallization of the intergrain phase and the presence of high-temperature 3Y2O3·5Al2O3 garnet in the phase composition. The microstructure of the ceramics is represented mainly by irregular grains with a maximum size of 12 μm and inclusions of elongated hexagonal crystals of Si3N4. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Silicon nitride structural ceramics with an elevated strength at 1300°C

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Publisher
Springer Journals
Copyright
Copyright © 1997 by Plenum Publishing Corporation
Subject
Chemistry; Characterization and Evaluation of Materials; Materials Science; Ceramics, Glass, Composites, Natural Methods
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1007/BF02768257
Publisher site
See Article on Publisher Site

Abstract

A high-temperature ceramics based on Si3N4 with an ultimate bending strength of 620 MPa at room temperature and 450 MPa at 1300°C has been developed using hot pressure casting and compression sintering. The ceramics is characterized by a high degree of crystallization of the intergrain phase and the presence of high-temperature 3Y2O3·5Al2O3 garnet in the phase composition. The microstructure of the ceramics is represented mainly by irregular grains with a maximum size of 12 μm and inclusions of elongated hexagonal crystals of Si3N4.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Nov 27, 2007

References

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