Ablative property and mechanism of SiC-CuxSiy modified C/C-ZrC composites prepared by a rapid method |
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| Affiliation: | 1. National Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha 410083, PR China;2. Advanced Technology & Materials Co., Ltd., Beijing 100081, PR China;3. School of Metallurgy and Environment, Central South University, Changsha 410083, PR China;1. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, PR China;2. Beijing Mechanical Equipment Institute, Beijing 100039, PR China;3. College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, No.29 Jiangjun Ave., Nanjing 211106, PR China;4. School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;2. College of Materials Science and Engineering, Changsha University & Science and Technology, Hunan 410114, China;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China;2. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China;3. School of Physical Science and Technology, ShanghaiTech University, Shanghai, China;1. Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi''an, Shaanxi 710072, China;2. Institute of China North Industry Group, No.52, Yantai 264003, China;3. School of Materials Science and Engineering, Chang''an University, Xi''an 710064, Shaanxi, China;1. Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150001, China;2. Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China;3. China d Center of Analysis and Measurement, Harbin Institute of Technology, Harbin 150001, China;4. National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China;5. Xi''an Aerospace Composites Research Institute, Academy of Aerospace Propulsion Technology, Xi‘an 710025, China |
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| Abstract: | A rapid method was developed to fabricate C/C-ZrC-SiC-CuxSiy composites with low open porosity by precursor infiltration and pyrolysis combining with pressure assisted reactive melt infiltration. Dominant phases of ZrC and SiC with scattered CuxSiy inclusions were present in continuous infiltrated matrix, in which the dimension of submicron ZrC particles displayed gradient change. At ablation test, the heat absorbing effect of CuxSiy-phase and formation of protective ZrO2-SiO2 cover enhanced the ablative property of composites for short-time ablation, causing ablation rates of 30 s ablation reached 1.7 ± 0.1 µm/s and 1.3 ± 0.1 mg/s, respectively. As ablation time extends to 60 s, the massive consumption of Si-phase damaged the integrity of surface oxide cover, but the partial melted ZrO2 improved the viscosity and self-healing ability of ZrO2-SiO2 mixture, protecting substrate from further erosion. Thus, ablation rates were increased and decreased to 3.8 ± 0.2 µm/s and 1.2 ± 0.1 mg/s, respectively. |
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| Keywords: | C/C composites Modification Infiltration High temperature ablation |
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