Frequency Effects on Fatigue Behavior of a Silicon Carbide Fiber-Reinforced Glass–Ceramic Composite (SiC/MAS) |
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| Authors: | Joon-Mo Ahn Shankar Mall Joon-Mo Ahn |
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| Affiliation: | Department of Aeronautics and Astronautics, Air Force Institute of Technology, Wright-Patterson AFB, Ohio 45433-7765;
Technical Development Center, Agency for Defense Development, Yuseong, Taejeon 305-600, Korea |
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| Abstract: | The effects of cyclic frequency on the fatigue behavior of silicon carbide (Nicalon) fiber-reinforced glass–ceramic matrix (SiC/magnesium aluminosilicate (MAS)) were investigated. Tension–tension fatigue tests were conducted at two frequencies, 10 and 900 Hz, to establish stress versus cycles to failure ( S–N ) relationships. Cycles to failure at a given stress level decreased with an increase of the applied frequency. Analysis of damage mechanisms suggests that there was an enhancement of fiber/matrix interfacial bonding at the higher frequency due to the formation of SiO2 from the reaction of oxygen species of the matrix with SiC of the fiber. |
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