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Mechanical Properties of Sic Whisker Reinforced β-SiAION Composites

Published online by Cambridge University Press:  25 February 2011

C. Yamagishi ,
J. Hakoshima ,
S. Nakajoh ,
N. Miyata  and
K. Tsukamoto
C. Yamagishi
Affiliation:
Central Research Laboratory of Nihon Cement Co., Ltd, 1-2-23 Kiyosumi Koto-ku, Tokyo, Japan
J. Hakoshima
Affiliation:
Central Research Laboratory of Nihon Cement Co., Ltd, 1-2-23 Kiyosumi Koto-ku, Tokyo, Japan
S. Nakajoh
Affiliation:
Central Research Laboratory of Nihon Cement Co., Ltd, 1-2-23 Kiyosumi Koto-ku, Tokyo, Japan
N. Miyata
Affiliation:
Central Research Laboratory of Nihon Cement Co., Ltd, 1-2-23 Kiyosumi Koto-ku, Tokyo, Japan
K. Tsukamoto
Affiliation:
Central Research Laboratory of Nihon Cement Co., Ltd, 1-2-23 Kiyosumi Koto-ku, Tokyo, Japan
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Abstract

The mechanical properties of SiC whisker, SiCw, reinforced β-Sialon composite were investigated. β-Sialon with 20 vol% SiCw showed excellent high temperature strength, 610 MPa at 1350°C, and fracture toughness, 5.3 MPa √m (Chevron Notched Beam, CNB, method). This fracture toughness value was an improvement of 75% over that of β-Sialon (monolithic material). This composite also showed excellent oxidation-resistance; the weight gain due to oxidation after 200 hr at 1350°C in dry air was 0.3 mg/cm2, and after oxidation the high temperature strength, 1350°C, was 683 MPa, an improvement over the pre-oxidation value. Also, in high temperature creep testing (200 hr at 1350°C and 300 MPa) deformation of the SiCw reinforced β-Sialon composite, SiCw/β-Sialon was 66% smaller than that of β-Sialon.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 287: Symposium K – Silicon Nitride Ceramics–Scientific and Technological Advances , 1992 , 487
Copyright
Copyright © Materials Research Society 1993

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References

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