Ultra-high-temperature ablation behavior of SiC–ZrC–TiC modified carbon/carbon composites fabricated via reactive melt infiltration |
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| Affiliation: | 1. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073, China;2. The Fifth Research Institute, Equipment Academy of the Second Artillery Force, Beijing 100094, China;3. Science and Technology on Advanced Functional Composites Laboratory, Aerospace Research Institute of Materials and processing Technology, Beijing 100076, China;1. State Key laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China;2. National Key Laboratory of Science and Technology for National Defence on High-strength Structural Materials, Central South University, Changsha, 410083, China;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China;2. China Academy of Launch Vehicle Technology, Beijing, 100076, China;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, PR China;2. The Hubei Province Key Laboratory of Coal Conversion & New Carbon Materials, Wuhan University of Science and Technology, Wuhan 430081, Hubei, PR China;3. Institute for Materials Research, University of Leeds, Leeds LS2 9JT, United Kingdom |
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| Abstract: | To improve the ablation resistance under the ultra-high temperature, the matrix of the carbon/carbon (C/C) composite was modified with a ternary ceramic of SiC–ZrC–TiC via reactive melt infiltration. The obtained ceramic matrix was composed of Zr-rich and Ti-rich solid solution phases of Zr1?xTixC and SiC. This composite exhibited an excellent ablation property at 2500 °C with low mass and linear ablation rates of 0.008 mg s?1 cm?2 and 0.000 μm s?1, respectively. The ablation mechanism was revealed with various microstructure characterizations and compared with those of C/C–SiC and C/C–TiC composites. Results showed that the degradations of these composites were primarily caused by the loss of the protective oxide scale via volatilization under the ultra-high temperature and flushing by high-speed airflow. The high ablation resistance of the C/C–SiC–ZrC–TiC composite was attributed to the protection of a multiphase oxide scale with high viscosity and low volatility. |
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| Keywords: | Composites Corrosion Carbides Oxides |
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