Effect of TiB2 on the self-crack-healing ability of SiC-Si coating at 1300 °C

被引：10

作者：

Wei, Yalong ^{[1
]}

Zhou, Lei ^{[1
]}

Zhang, Jiaping ^{[1
]}

Fu, Qiangang ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Shaanxi Key Lab Fiber Reinforced Light Composites, Xian 710072, Shaanxi, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2021年 / 425卷

基金：

中国国家自然科学基金;

关键词：

C/C composites; TiB2; Coating; Oxidation; Self-crack-healing; CARBON/CARBON COMPOSITES; C/C COMPOSITES; MECHANICAL-PROPERTIES; PACK CEMENTATION; GLASS-CERAMICS; OXIDATION; MICROSTRUCTURE; RESISTANCE; NANOWIRES; HFC;

D O I：

10.1016/j.surfcoat.2021.127675

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

TiB2-SiC-Si coating was prepared on the surface of C/C composites by slurry immersion pyrolysis combined with gas-phase silicon infiltration method. The influence of the addition of TiB2 on the oxidation resistance of Si-SiC coating was studied. TiB2 significantly increases the oxidation protection time of the SiC-Si coating at 1300 degrees C. The TiB2 modified Si-SiC coating displayed a weight increase (0.03%) after oxidation at 1300 degrees C for 300 h, while the unmodified coating had a weight loss of 0.84% after oxidation at 1300 degrees C for 100 h. It is found through experiments that doping TiB2 produces more molten glass phases when the ceramic coating is oxidized at 1300 degrees C, which effectively heals cracks and plays a good protective performance.

引用

页数：9

共 29 条

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