A thick SiC-Si coating prepared by one-step pack cementation for long-term protection of carbon/carbon composites against oxidation at 1773 K

被引：11
|
作者：
Zhang, Bei [1 ]
Yi, Maozhong [1 ]
Ning, Yao [1 ]
Xie, Aolin [1 ]
Zhou, Zhe [2 ]
Feng, Zhirong [1 ]
机构：
[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[2] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Peoples R China
来源：
CORROSION SCIENCE | 2022年 / 200卷
关键词：
SiC-Si coatings; Long-term oxidation resistance; Self-healing; Carbon; carbon composites; THERMAL-EXPANSION COEFFICIENT; ABLATION RESISTANCE; SILICON-CARBIDE; C/C COMPOSITES; ANTIOXIDATION PROPERTY; MICROSTRUCTURE; TEMPERATURE; IMPROVEMENT; NANOWIRES; BEHAVIOR;
D O I：
10.1016/j.corsci.2022.110223
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A thick SiC-Si coating for carbon/carbon (C/C) composites is prepared by one-step pack cementation (PC) process. The microstructure of the coating, the interface structure between the coating and the substrate, and anti-oxidation properties are investigated. As-prepared coating with a thickness of about 774 mu m has a dense and microcrack-free structure. Oxidation test results showed that weight gain of SiC-Si coated specimens is about 8.1 mg.cm(- 2) after oxidation at 1773 K for 338 h, and no failure. By exploring the oxidation resistance of coatings with different thicknesses, it can be found that thickness has a positive effect on coating performance.
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页数：9
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