Effect of microstructure on the ablation behavior and mechanical properties of CVD-HfC coating

被引：27
作者：
Zhang, Jian [1 ]
Zhang, Yulei [1 ]
Chen, Ruicong [1 ]
Zhu, Xiaofei [1 ]
Fu, Yanqin [1 ]
机构：
[1] Northwestern Polytech Univ, Shaanxi Key Lab Fiber Reinforced Light Composite, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
CORROSION SCIENCE | 2021年 / 192卷
基金：
中国国家自然科学基金;
关键词：
HfC coatings; Microstructure; Mechanical properties; Ablation resistance; CHEMICAL-VAPOR-DEPOSITION; HAFNIUM CARBIDE; CARBON/CARBON COMPOSITES; ELASTIC-MODULUS; MULTILAYER COATINGS; CERAMIC COATINGS; GROWTH-BEHAVIOR; OXIDATION; RESISTANCE; BARRIER;
D O I：
10.1016/j.corsci.2021.109815
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
HfC coatings with different microstructure were successfully fabricated by chemical vapor deposition. The mechanical properties and ablation resistance of HfC coatings were evaluated, and the coefficient of thermal expansion (CTE) and ablation behavior of the as-prepared coatings were investigated in detail. Results showed that HfC coating with the dense coarse columnar structure exhibits good mechanical properties, and the equiaxed structure has a low CTE. The fine columnar structure coating has better ablation resistance compared with other microstructures, and the mass ablation rate and linear rate are only 2.02 mg/s and 1.25 mu m/s after ablation for 90 s, respectively.
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页数：9
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