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High Temperature Fatigue Properties of Silicon Nitride in Nitrogen Atmosphere

Published online by Cambridge University Press:  25 February 2011

Yasuhiro Shigegaki ,
Takashi Inamura ,
Akihiko Suzuki  and
Tadashi Sasa
Yasuhiro Shigegaki
Affiliation:
Ishikawajima-Harima Heavy Industries Co., Ltd., Research Institute, 3–1–15 Toyosu, Koto-ku, Tokyo 135, Japan
Takashi Inamura
Affiliation:
Ishikawajima-Harima Heavy Industries Co., Ltd., Research Institute, 3–1–15 Toyosu, Koto-ku, Tokyo 135, Japan
Akihiko Suzuki
Affiliation:
Ishikawajima-Harima Heavy Industries Co., Ltd., Research Institute, 3–1–15 Toyosu, Koto-ku, Tokyo 135, Japan
Tadashi Sasa
Affiliation:
Ishikawajima-Harima Heavy Industries Co., Ltd., Research Institute, 3–1–15 Toyosu, Koto-ku, Tokyo 135, Japan
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Abstract

Cyclic and static fatigue properties of pressure-less sintered silicon nitride were evaluated at 1000° C in air and in nitrogen using four-point bending mode. The data of cyclic fatigue tests or static fatigue tests and the morphology of the fractured surfaces in nitrogen were compared with those in air. The cyclic fatigue behavior was remarkably influenced by the atmosphere, while the static fatigue was less influenced. Crack healing effect due to the oxidation around the crack are thought to be the most probable mechanism to affect the cyclic fatigue rate in air.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 287: Symposium K – Silicon Nitride Ceramics–Scientific and Technological Advances , 1992 , 461
Copyright
Copyright © Materials Research Society 1993

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References

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