Xinbo He, Bin Ye, Xuanhui Qu, Changrui Zhang, and Xingui Zhou, Processing and characterization of Cf/SiC composites, J. Univ. Sci. Technol. Beijing, 12(2005), No. 5, pp. 460-463.
Cite this article as:
Xinbo He, Bin Ye, Xuanhui Qu, Changrui Zhang, and Xingui Zhou, Processing and characterization of Cf/SiC composites, J. Univ. Sci. Technol. Beijing, 12(2005), No. 5, pp. 460-463.
Xinbo He, Bin Ye, Xuanhui Qu, Changrui Zhang, and Xingui Zhou, Processing and characterization of Cf/SiC composites, J. Univ. Sci. Technol. Beijing, 12(2005), No. 5, pp. 460-463.
Citation:
Xinbo He, Bin Ye, Xuanhui Qu, Changrui Zhang, and Xingui Zhou, Processing and characterization of Cf/SiC composites, J. Univ. Sci. Technol. Beijing, 12(2005), No. 5, pp. 460-463.
State Key Laboratory for Advanced Metals and Materials, Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China
School of Aerospace and Materials Engineering, National University of Defense Technology, Changsha 410073, China
Carbon fiber-reinforced SiC composites were prepared by precursor pyrolysis-hot pressing (PP-HP) and precursor impregnation-pyrolysis (PIP), respectively. The effect of fabrication methods on the microstructure and mechanical properties of the composites was investigated. It was found that the composite prepared by PP-HP exhibits a brittle fracture behavior, which is mainly ascribed to a strongly bonded fiber/matrix interface and the degradation of the fibers caused by a higher processing temperature. On the contrary, the composite prepared by PIP shows a tough fracture behavior, which could be rationalized on the basis of a weakly bonded fiber/matrix interface as well as a higher strength retention of the fibers. As a result, in comparison with the composite prepared by PP-HP, the composite prepared by PIP achieves better mechanical properties with a flexural strength of 573.4 MPa and a fracture toughness of 17.2 MPa·m1/2.
State Key Laboratory for Advanced Metals and Materials, Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China
School of Aerospace and Materials Engineering, National University of Defense Technology, Changsha 410073, China
Carbon fiber-reinforced SiC composites were prepared by precursor pyrolysis-hot pressing (PP-HP) and precursor impregnation-pyrolysis (PIP), respectively. The effect of fabrication methods on the microstructure and mechanical properties of the composites was investigated. It was found that the composite prepared by PP-HP exhibits a brittle fracture behavior, which is mainly ascribed to a strongly bonded fiber/matrix interface and the degradation of the fibers caused by a higher processing temperature. On the contrary, the composite prepared by PIP shows a tough fracture behavior, which could be rationalized on the basis of a weakly bonded fiber/matrix interface as well as a higher strength retention of the fibers. As a result, in comparison with the composite prepared by PP-HP, the composite prepared by PIP achieves better mechanical properties with a flexural strength of 573.4 MPa and a fracture toughness of 17.2 MPa·m1/2.
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