Creep behavior in SiC-whisker reinforced silicon nitride composite |
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Authors: | S Zhu M Mizuno Y Kagawa H Kaya |
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Affiliation: | (1) Japan Fine Ceramics Center,, Atsuta-ku, Nagoya, 456-8587,, Japan;(2) Institute of Industrial Sciences,, The University of Tokyo,, Tokyo, 106,, Japan;(3) Petroleum Energy Center,, Minato-ku, Tokyo, 105-0001,, Japan |
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Abstract: | Tensile and flexural creep tests of 20 vol % SiC whiskers reinforced Si3N4 composite processed by gas pressure sintering have been carried out in air in the temperature range of 1000–1300°C. The stress
exponent for flexural creep is 16 at 1000°C. However, at 1200 and 1250°C the stress exponents for both tensile and flexural
creep vary with increasing stress. In the low stress region, the activation energy for creep is 1000 kJ/mol. In the high stress
region, it is 680 kJ/mol. The different creep mechanisms dominate in the low and high stress regions, respectively.
This revised version was published online in September 2006 with corrections to the Cover Date. |
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