Mechanical Properties of Alumina/Silicon Carbide Whisker Composites |
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Authors: | Satoshi lio Masakazu Watanabe Masaru Matsubara Yasushi Matsuo |
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Affiliation: | Research and Development Department, NGK Spark Plug Company, Ltd., Komaki, Aichi 485, Japan |
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Abstract: | The improvement of mechanical properties of Al2O3/SiC whisker composites has been studied with emphasis on the effects of the whisker content and of the hot-pressing temperature. Mechanical properties such as fracture toughness and fracture strength increased with increasing whisker content up to 40 wt%. In the case of the high SiC whisker content of 40 wt%, fracture toughness of the sample hot-pressed at 1900° decreased significantly, in spite of densification, compared with one hot-pressed at 1850°. Fracture toughness strongly depended on the microstructure, especially the distribution of SiC whiskers rather than the grain size of the Al2O3 matrix. |
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Keywords: | composites alumina silicon carbide mechanical properties whiskers |
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