Damage resistance and R-curve behavior of multilayer Al2O3/SiC ceramics |
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| Authors: | Jihong She Takahiro Inoue Kazuo Ueno |
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| Affiliation: | Department of Energy Conversion, Osaka National Research Institute, Midorigaoka 1-8-31, Ikeda, Osaka 563-8577, Japan |
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| Abstract: | Damage resistance and R-curve behavior of multilayer Al2O3/SiC ceramics were evaluated in bending by the indentation-strength and the single-edge-notched-beam methods. Due to the crack deflection at the Al2O3/SiC interfaces, a plateau indentation strength response was achieved, suggesting an exceptional resistance to contact-induced damage. Moreover, fracture toughness was observed to increase from 8.0 to 15.5 MPa m1/2 with increasing notch depth from 0.5 to 2.0 mm, indicative of a strong R-curve behavior. |
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| Keywords: | B Interfaces C Fracture C Mechanical properties D Al2O3 |
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