Long-term oxidation of MoSi2-modified HfB2-SiC-Si/SiC-Si coating at 1700°C

被引：5

作者：

Ding, Wuqing ^{[1
]}

Zhou, Lei ^{[1
,2
]}

Zhang, Jiaping ^{[1
]}

Fu, Qiangang ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Shaanxi Key Lab Fiber Reinforced Light Weight Com, Xian, Peoples R China

[2] Wuxi BoZhi Composite Mat Co LTD, Wuxi, Peoples R China

来源：

SURFACE ENGINEERING | 2023年 / 39卷 / 03期

基金：

中国国家自然科学基金;

关键词：

C-f/C composites; coating; slurry impregnation with gaseous Si infiltration; oxidation behaviour at 1700 degrees C; mosaic structure; pinning effect; MoB; protection mechanism; HIGH-TEMPERATURE OXIDATION; IN-SITU SYNTHESIS; CARBON/CARBON COMPOSITES; C/C COMPOSITES; DEGREES-C; BEHAVIOR; RESISTANCE;

D O I：

10.1080/02670844.2023.2223454

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Slurry impregnation and gaseous Si infiltration were effectively used to produce compact MoSi2-doped Si-HfB2-SiC/Si-SiC (HMSS/SS) coatings with a thickness of 250 mu m to protect carbon fibre reinforced carbon (C-f/C) composites from oxygen corrosion at 1700 degrees C. The HMSS/SS coating obtained with a mosaic structure makes it possible to protect C-f/C composites at 1700 degrees C for 276 h and the mass reduction is only 0.99%. The pinning effect of the embedded hafnia, the generated MoB together with the Hf, Mo co-doped Si-based glass layer, which successfully prevented the migration of oxygen, was attributed to the superior oxidation protection ability of the HMSS/SS coatings. This work provides a practical method for successfully extending the service life of C-f/C composites in the aerospace industry.

引用

页码：315 / 325

页数：11

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