316 International Journal of Applied Ceramic Technolog-Liut, et al. Vol.8,No.2,2011 of Sic fiber than that of carbon fiber and lower fracture 6. K.T. Faber, "Ceramic Composite Interfaces: Properties and Design, Anna. energy of heat-treated Py C interphase than that of un- 7. H. Mei, "Measurement and Calculation of Thermal Residual Stress in Fiber treated PyC interphase can make the interphase debond einforced Ceramic Matrix Composites, Compos. Sci. Technol., 68[15-16 during loading and consequently increase the strength 3285-3292(2008) 8. S.J. Wu, L F. Cheng. Q. Zhang L. T. Zhang, and Y. D. Xu,Thermo- ughness of the composites ()After oxidation in air at 700C for 10 h, the hmol,3l75-79(200) 9. M. Takeda, er ability of the Low-Oxygen-Conter posite was only 0. 26%, much Carbide Fiber lower than those of C/PyC/SiC and C/PyC/SiC 10. B. A Bender, J. S. Wallace, and D.J. Schrodt, " Effect of Thermochemical composites,4.23%, 2.53%, respectively. The strength on the Strength and Microstructure of SiC Fibres, ". Mater. Sci, etained ratio of hybrid composite was 99%, much 970-976(1991 I1. A. G. Evans and F. W. Zok, Review, the Physics and Mechanics of Fiber- higher than those of the other two composites, 67%, einforced Brittle Matrix Composites, " J. Mater. Sci., 29 [15]3857-3896 78%, ely 12. F. Rebaillat, ]. Lamon, and A G. Evans, Microcomposite Test Procedure for References 13. K Honjo, " Fracture Toughness of PAN-Based Carbon Fibers Estimated Lin,"Design, Preparation and Properties de cmcs 14. D. Wongs Modeling Failure Mechanism of Designed-to Fail Par 76 nd Nuclear Reactors: An Overview, Comp. Sci. 15. O. Nala. Bansal, and P. Narottam. ""In-PLane and Interlaminar Shear Influence of Interface Characteristics on the Mechanical Prop- trength of a Unidirectional Hi-Nicalon Fiber-Reinforced Celsian Matrix yranno-SA3 Fiber-Reinforced SiC/SiC Mini- omposites,Int / App. Ceram. Tecbomol, 7 291-303(2010). 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