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Phase Relationship Studies of Silicon Nitride System—A Key to Materials Design

Published online by Cambridge University Press:  25 February 2011

T.S. Yen
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, P.R., China
W.Y. Sun
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, P.R., China
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Abstract

Additions and revisions to several of the most important phase diagrams and phase behavior diagrams in the silicon nitride field are reviewed in this work, with emphasis on the Y-Si-A1-O-N system. This information is further used to make observations on the promising silicon nitride systems containing either highly refractory grain boundary phases or compatible matrix phases of desirable properties. Examples are provided to illustrate the advantage of such a basic approach to materials design. Hardness, toughness, strength at room temperature and elevated temperature and even sinterability can all be improved by adopting such an approach.

Type
Research Article
Copyright
Copyright © Materials Research Society 1993

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