Ablation behavior and mechanism of SiC/Zr–Si–C multilayer coating for PIP-C/SiC composites under oxyacetylene torch flame |
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| Affiliation: | 1. Vietnam National University, Hanoi, Viet Nam;2. Military Academy of Logistics, Viet Nam;1. Faculty of Mechanical Engineering, University of Engineering and Technology, Av. Cascanueces 2281, Santa Anita, Lima, Peru;2. Faculty of Mechanical Engineering, National University of Engineering, Av. Túpac Amaru 210, Rimac, Lima, Peru;1. Institute of Vibration, Shock and Noise, State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, 800 Dong Chuan Road, 200240 Shanghai, PR China;2. Naval Research Center, 100073 Beijing, Box 1303-14, PR China;1. National Key Laboratory of Science and Technology for Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China;2. Composite Materials and Structure Laboratory, Department of Mechanical, Materials and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA;3. Composite Material Research Laboratory, Department of Mechanical Engineering, University of New Orleans, LA 70148, USA;1. CT2M – Centre for Mechanical and Materials Technologies, University of Minho, Azurém, 4800-058 Guimarães, Portugal;2. Cross–Border Faculty of Humanities, Economics and Engineering, University of Galati, Dunarea de Jos, Domneasca 47, 800008 Galati, Romania |
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| Abstract: | To improve the ablation resistance of PIP-C/SiC composites, SiC/Zr–Si–C multilayer coating was prepared by chemical vapor deposition (CVD) using methyltrichlorosilane (MTS) and hydrogen as the precursors and molten salt reaction using KCl–NaCl, sponge Zr and K2ZrF6, then the ablation capability of the coated composites was tested under oxyacetylene torch flame. The linear and mass ablation rates were much lower than those of uncoated samples. The linear and mass ablation rates of the three coating coated samples reached 0.0452 mm/s and 0.031 g/s, decreased by 27.3% and 27.1%, respectively. Moreover, the linear and mass ablation rates of the five coating coated samples reached 0.0255 mm/s and 0.0274 g/s, decreased by 59.0% and 35.5%. The gases released during ablation could take away a lot of heat, which was also helpful to the protection of the composites. |
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| Keywords: | A Ceramic–matrix composites (CMCs) B Corrosion B High-temperature properties E Chemical vapor deposition (CVD) Molten salt |
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