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

IF 2.4 4区 材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS
Wu Ding, Lei Zhou, Jiaping Zhang, Q. Fu
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引用次数: 1

Abstract

ABSTRACT 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 μm to protect carbon fibre reinforced carbon (Cf/C) composites from oxygen corrosion at 1700°C. The HMSS/SS coating obtained with a mosaic structure makes it possible to protect Cf/C composites at 1700°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 Cf/C composites in the aerospace industry.
mosi2改性HfB2-SiC-Si / SiC-Si涂层在1700℃下的长期氧化
摘要浆料浸渍和气体硅渗透有效地用于制备厚度为250μm的MoSi2掺杂Si–HfB2–SiC/Si–SiC(HMS/SS)涂层,以保护碳纤维增强碳(Cf/C)复合材料在1700°C下免受氧腐蚀。采用镶嵌结构获得的HMSS/SS涂层可以在1700°C下保护Cf/C复合材料276 h,质量还原率仅为0.99%。嵌入的铪、生成的MoB以及Hf、Mo共掺杂的Si基玻璃层的钉扎效应成功地阻止了氧的迁移,这归因于HMSS/SS涂层优异的抗氧化能力。这项工作为航空航天工业中成功延长Cf/C复合材料的使用寿命提供了一种实用的方法。
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来源期刊
Surface Engineering
Surface Engineering 工程技术-材料科学:膜
CiteScore
5.60
自引率
14.30%
发文量
51
审稿时长
2.3 months
期刊介绍: Surface Engineering provides a forum for the publication of refereed material on both the theory and practice of this important enabling technology, embracing science, technology and engineering. Coverage includes design, surface modification technologies and process control, and the characterisation and properties of the final system or component, including quality control and non-destructive examination.
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