Mechanical Properties of Si2N2O/SiC-Whisker Composites
The mechanical and thermal properties of Si2N2O/SiC‐whisker composites were studied with emphasis on the effect of matrix composition and of whisker content. The fracture toughness of Si2N2O was remarkably improved by 90% with a concomitant 70% strength improvement by addition of SiC whiskers of onl...
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Veröffentlicht in: | Journal of the American Ceramic Society 1991-02, Vol.74 (2), p.296-300 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The mechanical and thermal properties of Si2N2O/SiC‐whisker composites were studied with emphasis on the effect of matrix composition and of whisker content. The fracture toughness of Si2N2O was remarkably improved by 90% with a concomitant 70% strength improvement by addition of SiC whiskers of only 10 vol%. Optimum mechanical and thermal properties of Si2N2O/SiC‐whisker composites were obtained at an equimolar ratio of Si3N4/SiO2, which is the stoichiometric composition for Si2N2O. Additional investigation concerning the Si2N2O‐matrix/SiC‐whisker interface by controlling sintering additives is necessary for further improvement of mechanical and thermal properties of Si2N2O/SiC‐whisker composites. |
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ISSN: | 0002-7820 1551-2916 |
DOI: | 10.1111/j.1151-2916.1991.tb06878.x |