Abstract
The fracture behavior of carbon fiber-reinforced silicon carbide (C/SiC) composites used in rocket nozzles has been investigated under tension, compression, and fracture conditions at room temperature, 773 K and 1173 K. The C/SiC composites used in this study were manufactured by liquid silicon infiltration process at ~1723 K. All experiments were conducted using two types of specimens, considering fiber direction and oxidation condition. Experimental results show that temperature, fiber direction, and oxidation condition affect the behavior of C/SiC composites. Oxidation was found to be the main factor that changes the strength of C/SiC composites. By applying an anti-oxidation coating, the tensile and compressive strengths of the C/SiC composites increased with temperature. The fracture toughness of the C/SiC composites also increased with increase temperature. A fractography analysis of the fractured specimens was conducted using a scanning electron microscope.
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Dong Hyun Yoon received his B.S. degree in Mechanical Design Engineering from Chungnam National University, Korea in 2016. His research interests are in the area of fracture mechanics, fatigue behaviors, and composite materials.
Jae Hoon Kim received his B.S. degree in Precision Mechanical Engineering from Chungnam National University, Korea in 1980. He received his master’s and Ph.D. degrees in Mechanical Engineering from Chungnam National University, Korea in 1982 and 1989, respectively. He is currently a Professor at Chungnam National University, Korea. Prof. Kim’s research interests are in the area of fracture mechanics, fatigue behaviors, and composite materials.
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Yoon, D.H., Lee, J.W., Kim, J.H. et al. Fracture behavior of C/SiC composites at elevated temperature. J Mech Sci Technol 31, 3647–3651 (2017). https://doi.org/10.1007/s12206-017-0702-3
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DOI: https://doi.org/10.1007/s12206-017-0702-3