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Microstructure and Properties of Nanosemicrystalline Si3N4 Ceramics with Doped Sintering Additives: Part II. Phase Transformation and Microstructural Control

Published online by Cambridge University Press:  31 January 2011

K. H. Ryu  and
J-M. Yang
K. H. Ryu
Affiliation:
Department of Materials Science and Engineering, University of California–Los Angeles, Los Angeles, California 90095–1595
J-M. Yang
Affiliation:
Department of Materials Science and Engineering, University of California–Los Angeles, Los Angeles, California 90095–1595
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Abstract

The low temperature pressureless sintering of a nanosized Si3N4 powder with doped sintering additives was investigated. The microstructural evolution during sintering at different temperatures was analyzed using x-ray diffraction and scanning electron microscopy. The effect of using nanosized Si3N4 powder as a catalyst to accelerate the α→β–Si3N4 transformation of a commercial Si3N4 powder with larger particle sizes was also investigated. Finally, two stage sintering was used to study the feasibility of controlling the microstructure and the mechanical properties of the nanosized silicon nitride.

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Type
Articles
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Journal of Materials Research , Volume 13 , Issue 9 , September 1998 , pp. 2588 - 2596
Copyright
Copyright © Materials Research Society 1998

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