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Quantity and character of grain boundary phase in mixed α′/β′ sialon ceramics

Published online by Cambridge University Press:  03 March 2011

Koji Watari ,
Shuji Sakaguchi ,
Shuzo Kanzaki ,
Toyohiro Hamasaki  and
Kozo Ishizaki
Koji Watari
Affiliation:
National Industrial Research Institute of Nagoya, Hirate-cho, Kita-ku, Nagoya 462, Japan
Shuji Sakaguchi
Affiliation:
National Industrial Research Institute of Nagoya, Hirate-cho, Kita-ku, Nagoya 462, Japan
Shuzo Kanzaki
Affiliation:
National Industrial Research Institute of Nagoya, Hirate-cho, Kita-ku, Nagoya 462, Japan
Toyohiro Hamasaki
Affiliation:
Department of Materials Science, School of Engineering, Nagaoka University of Technology, Nagaoka 940-21, Japan
Kozo Ishizaki
Affiliation:
Department of Materials Science, School of Engineering, Nagaoka University of Technology, Nagaoka 940-21, Japan
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Abstract

The quantity and character of intergranular phases in mixed α′/β′ sialon ceramics were examined by low-temperature specific heat and internal friction measurements. Present results of specific heat suggest the existence of a small amount of intergranular glassy phase in mixed α′/β′ sialon ceramics. Furthermore, it can be predicted that the material possesses excellent high strength at elevated temperatures, because the temperature dependence of the internal friction in the tested material is similar to that in the annealed Si3N4 ceramics with oxide addition and Si3N4 ceramics without sintering aid.

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Type
Rapid Communications
Information
Journal of Materials Research , Volume 9 , Issue 11 , November 1994 , pp. 2741 - 2744
Copyright
Copyright © Materials Research Society 1994

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