A low-temperature prepared composite coating to protect SiC-coated C/C composites against oxidation in a wide temperature range for long-life service |
| |
| Affiliation: | 1. Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials, Northwestern Polytechnical University, Xi''an 710072, PR China;2. Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea;1. School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, 123, Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea;2. Ceramic Composites Team, DACC Carbon, 30 Unam-ro, Deokjin-gu, Jeonju-si, Jeonbuk 54853, Republic of Korea;3. Agency for Defense Development (ADD), Sanhaghoegwan, Yuseong-gu, Daejeon 34186, Republic of Korea;4. Research Center for Innovative Energy and Carbon Optimized Synthesis for Chemicals(Inn-ECOSysChem), Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea;1. Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, Taiwan;2. Hocheng Corporation, Yingge District, New Taipei City, Taiwan;3. National Chung-Shan Institute of Science & Technology, Dual-Use Technology Development Center, Longtan District, Taoyuan City, Taiwan;1. Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China;2. Key Laboratory of Aero-engine Thermal Environment and Structure, Ministry of Industry and Information Technology, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China;3. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China;1. State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;2. Hubei Longzhong Laboratory, Xiangyang 441000, Hubei, China |
| |
| Abstract: | To improve the oxidation resistance of carbon/carbon (C/C) composites in a wide temperature range (1173–1773 K), a composite coating containing rich B2O3 glass was prepared on SiC-coated C/C composites by slurry dipping-densifying at low temperature. Borosilicate and SiO2 glasses acted as oxygen barriers at low and medium-high temperatures, respectively. Besides, Hf-oxides (HfO2, HfSiO4) ceramic particles improved the thermal stability of the glass and enhanced the crack resistance of glass layer. Therefore, the composite coating can effectively protect C/C composites against oxidation for 403 h at 1173 K, 723 h at 1473 K and 403 h at 1773 K with the mass gain of 3.77 g·m−2, 21.41 g·m−2 and 0.42 g·m−2, respectively. After 50 times thermal cycles between room temperature and 1773 K, the mass gain of the coated sample was 3.95 g·m−2 and the mass retention rate was up to 98.19 % during the thermos-gravimetric test from room temperature to 1773 K. |
| |
| Keywords: | Carbon/carbon composites Composite coating Low-temperature preparation Oxidation in a wide temperature range Long-life |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
