Characterization and mechanical properties of Cf/ZrB2-SiC composites fabricated by a hybrid technique based on slurry impregnation,polymer infiltration and pyrolysis and low-temperature hot pressing |
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Authors: | Dongyang Zhang Ping Hu Jiaxin Feng Maosong Xie Hong Zhao Xinghong Zhang |
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Affiliation: | 1. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China;2. Qiqihar University, Qiqihar, China |
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Abstract: | The continuous carbon fiber reinforced ZrB2-SiC composite was fabricated successfully via a hybrid technique based on nano ceramic slurry impregnation, polymer infiltration and pyrolysis and low-temperature hot pressing. The Cf/ZrB2-SiC composites exhibited non-brittle fracture modes and the chemical interaction at the fiber/matrix interfaces was effectively inhibited owing to the low sintering temperature. The S2-Cf/ZrB2-SiC composite presented the highest mechanical properties with fracture toughness of 4.47?±?0.15?MPa?m1/2 and the work of fracture of 877?J/m2, which was attributed to the multiple length-scale toughening mechanisms including the macroscopic toughening mechanisms of crack deflection and crack branching, the micro toughening mechanisms of fiber bridging and fiber pull-out. This work presented a novel and effective method to fabricate high-performance continuous carbon fiber reinforced ceramic matrix composites. |
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Keywords: | Carbon fiber Microstructures Mechanical properties Multiple toughening mechanisms |
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