Journal of Inorganic Materials, Volume. 39, Issue 8, 920(2024)
Figures & Tables(16)
3. Crack healed through thermal expansion and oxidation of SiC matrix
4. Diffusion of oxygen in SiC cracks (a) and oxidation channel of carbon fibers (b)
6. Mass retention rate (a), function fitting of $ \left(1-\eta_{\mathrm{m}}\right)^{2}$ with t (b), strength retention rate (c), and function fitting of $ \left(1-\eta_{\mathrm{R}}\right)^{2}$ with t (d) for tubular C/SiC composites after high-temperature air oxidation
7. Morphology and distributions of elements on the surface of tubular C/SiC composite
8. Microstructures at fractures of tubular C/SiC composites after high-temperature air oxidation
9. Microstructures at fractures of carbon fibers in tubular C/SiC composites after high-temperature air oxidation
10. Microstructures of cross-sections of tubular C/SiC composites after high-temperature air oxidation
11. EDS distributions of oxygen contents at cross sections of tubular C/SiC composites after 1100 ℃-1 h (a), 1300 ℃-0.5 h (b) and 1300 ℃-1 h (c) high-temperature air oxidation
12. Distributions of mole fraction of oxygen (a), gradient of mole fraction (b) and mole fraction with diffusion progress (c) in microcracks of SiC matrix
13. Predicted results of strength retention rate (a) and mass retention rate (b)
Table 1. Parabolic rate constant of SiC in air oxidation
View tableView in ArticleTable 1. Parabolic rate constant of SiC in air oxidation
Parameter 900 ℃ 1000 ℃ 1100 ℃ 1200 ℃ 1300 ℃ B/(nm2∙min-1) 1.05 10.29 39.48 84.84 163.17
Table 2. Parameters of oxidation for 10 h
View tableView in ArticleTable 2. Parameters of oxidation for 10 h
Parameter 900 ℃ 1100 ℃ 1300 ℃ $ D_{\mathrm{O}_{2}}^{z} $ /(m2∙s–1)3.18×10-5 3.53×10-5 3.86×10-5 B/(nm2∙s-1) 0.0175 0.658 2.720 Z/μm 0.0251 0.1539 0.3129 e/μm 1.980 1.835 1.658 $ R_{\mathrm{O}_{2}}^{z} $ /(mol∙m–3∙s–1)1.937×10-2 1.128×10-2 2.880×10-1
Table 3. Modifying factor of equivalent oxidation depth
View tableView in ArticleTable 3. Modifying factor of equivalent oxidation depth
Modifying factor 900 ℃ 1100 ℃ 1300 ℃ $ \beta $ 1.2×10-5 3.1×10-5 6.0×10-5
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Wenxin QUAN, Yiping YU, Bing FANG, Wei LI, Song WANG.
Paper Information
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Received: Jan. 2, 2024
Accepted: --
Published Online: Dec. 12, 2024
The Author Email: Song WANG (wangs0731@163.com)
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