Oxidation and ablation protection of plasma sprayed LaB6-MoSi2-ZrB2 coating for carbon/carbon composites

被引：47
|
作者：
Wang, Changcong [1 ]
Li, Kezhi [1 ]
He, Qinchuan [1 ]
He, Danyang [2 ]
Huo, Caixia [1 ]
Su, Yangyang [1 ]
Shi, Xiaohong [1 ]
Li, Hejun [1 ]
机构：
[1] Northwestern Polytech Univ, Carbon Carbon Composites Res Ctr, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[2] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Xian 710021, Shaanxi, Peoples R China
来源：
CORROSION SCIENCE | 2019年 / 151卷
基金：
中国国家自然科学基金;
关键词：
Carbon/carbon composites; Coating; Oxidation; Ablation; RARE-EARTH-OXIDES; C/C COMPOSITES; C/C-SIC-ZRB2; COMPOSITES; ZIRCONIUM DIBORIDE; SIC NANOWIRES; RESISTANCE; BEHAVIOR; TEMPERATURE; EVOLUTION; FABRICATION;
D O I：
10.1016/j.corsci.2019.01.043
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To improve the high-temperature stability of carbon/carbon (C/C) composites, a LaB6-MoSi2-ZrB2 (LMZ) coating was deposited on SiC-encapsulated C/C composites by supersonic atmospheric plasma spraying. The sprayed LMZ coating showed a significant improvement of oxidation and ablation protective abilities relative to MoSi2 and ZrB2 coatings, which could protect C/C composites for more than 80 h at 1773 K in static air and 60 s above 2000 K under oxyacetylene flame. La and Zr acted as the role in accelerating the liquid phase sintering of SiO2-based oxides, forming a compact Si-Zr-La-O compound scale to enhance the high-temperature stability of LMZ coating.
引用
收藏
页码：57 / 68
页数：12
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