Preparation of Dense Ceramics Based on Silicon Nitride Nanopowders

Preparation of Dense Ceramics Based on Silicon Nitride Nanopowders Synthesis of ceramics from silicon nitride nanopowders using hot-pressing and pressure-assisted and microwave (MW) sintering techniques has been studied. Dense ceramics with improved physicomechanical characteristics can be prepared on condition that most of the oxygen in the form of silicon monoxide (contained at 5 – 8 wt.% in the precursor powders) has been removed from the material. In ceramics treated by the three sintering technologies, an extensive grain growth is observed. The microstructure of these materials was more disperse in comparison with that of ceramic prepared from conventional α-Si3N4 powders synthesized in a furnace. This provides a route towards preparing nanopowder-based ceramics with a 25 – 30% increase in strength in comparison to ceramics of the same density prepared from conventional powders. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Preparation of Dense Ceramics Based on Silicon Nitride Nanopowders

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2003 by Plenum Publishing Corporation
Subject
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1023/A:1027327414392
Publisher site
See Article on Publisher Site

Abstract

Synthesis of ceramics from silicon nitride nanopowders using hot-pressing and pressure-assisted and microwave (MW) sintering techniques has been studied. Dense ceramics with improved physicomechanical characteristics can be prepared on condition that most of the oxygen in the form of silicon monoxide (contained at 5 – 8 wt.% in the precursor powders) has been removed from the material. In ceramics treated by the three sintering technologies, an extensive grain growth is observed. The microstructure of these materials was more disperse in comparison with that of ceramic prepared from conventional α-Si3N4 powders synthesized in a furnace. This provides a route towards preparing nanopowder-based ceramics with a 25 – 30% increase in strength in comparison to ceramics of the same density prepared from conventional powders.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Oct 17, 2004

References

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