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Transmission electron microscopy observation in a liquid-phase-sintered SiC with oxynitride glass

Published online by Cambridge University Press:  31 January 2011

Guo-Dong Zhan ,
Mamoru Mitomo ,
Young-Wook Kim ,
Rong-Jun Xie  and
Amiya K Mukherjee
Guo-Dong Zhan*
Affiliation:
Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616
Mamoru Mitomo
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1–1, Tsukuba-shi, Ibaraki 305, Japan
Young-Wook Kim
Affiliation:
Department of Materials Science and Engineering, University of Seoul, Seoul 130–743, Korea
Rong-Jun Xie
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1–1, Tsukuba-shi, Ibaraki 305, Japan
Amiya K Mukherjee
Affiliation:
Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616
*
a)Address all correspondence to this author.
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Abstract

Using a pure α–SiC starting powder and an oxynitride glass composition from the Y–Mg–Si–Al–O–N system as a sintering additive, a powder mixture was hot-pressed at 1850 °C for 1 h under a pressure of 20 MPa and further annealed at 2000 °C for 4 h in a nitrogen atmosphere of 0.1 MPa. High-resolution electron microscopy and x-ray diffraction studies confirmed that a small amount of β–SiC was observed in the liquid-phase-sintered α–SiC with this oxynitride glass, indicating stability of β–SiC even at high annealing temperature, due to the nitrogen-containing liquid phase.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 16 , Issue 8 , August 2001 , pp. 2189 - 2191
Copyright
Copyright © Materials Research Society 2001

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References

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