期刊
CERAMICS INTERNATIONAL
卷 45, 期 5, 页码 5467-5474出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.12.001
关键词
Carbon fiber; ZrB2; Microstructures; Mechanical properties; Multiple toughening mechanisms
资金
- National Natural Science Foundation of China [51872059, 51772061, 11572353]
- National Fund for Distinguished Young Scholars [51525201]
- State Key Laboratory of Advanced Welding and Joining [17-M-07]
- Fundamental Research Funds for the Central Universities [HIT.BRETIII.201506]
- Major State Basic Search Program [2014CB46505]
- Major Projects of Natural Science Research in Anhui Province [KJ2017ZD50]
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 C-f/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-C-f/ZrB2-SiC composite presented the highest mechanical properties with fracture toughness of 4.47 +/- 0.15 MPa m(1/2) and the work of fracture of 877 J/m(2), 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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