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炭/炭复合材料表面SiC/ZrSiO4-SiO2复合涂层的抗氧化性能与红外发射特性研究
作者:
作者单位:

湖南工业大学 冶金工程学院,中南大学 粉末冶金国家重点实验室,中南大学 粉末冶金国家重点实验室,中南大学 粉末冶金国家重点实验室

中图分类号:

TB332

基金项目:

国家重点基础研究发展计划（973计划）


The anti-oxidation and infrared emissivity property of SiC/ZrSiO4-SiO2 composite coatings on carbon/carbon composites
Author:
Affiliation:

College of Metallurgical Engineering,Hunan University of Technology,State Key Laboratory of Powder Metallurgy,Central South University,State Key Laboratory of Powder Metallurgy,Central South University,State Key Laboratory of Powder Metallurgy,Central South University

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    摘要:

    为提高炭/炭(C/C)复合材料的高温抗氧化性能并降低其红外发射率,采用包埋–刷涂法在其表面制备了SiC/ZrSiO4-SiO2复合涂层。借助XRD、SEM和EDS等表征分析了涂层的成分与微观结构,并研究了SiC/ZrSiO4-SiO2复合涂层包覆C/C复合材料在1400℃和1500℃动态空气条件下的抗氧化性能,以及在90℃和500℃下的红外发射率。结果表明：由疏松结构SiC内涂层和镶嵌结构ZrSiO4-SiO2外涂层组成的SiC/ZrSiO4-SiO2复合涂层具有优异的抗氧化性能,在1400℃和1500℃流动空气(0.6 L/min)等温氧化条件下氧化50h后试样的氧化失重率分别仅为0.124%和0.03%。在C/C复合材料表面制备SiC/ZrSiO4-SiO2复合涂层后其红外发射率明显降低,并随温度升高而越低。复合涂层包覆试样在90℃时3~5μm和8~14μm波段的平均红外发射率分别为0.55和0.66；在500℃时3~5μm和8~14μm波段的平均红外发射率分别为0.48和0.62。SiC/ZrSiO4-SiO2复合涂层包覆C/C复合材料可作为优良的低红外发射率高温热结构材料应用于航空航天领域。

    Abstract:

    The SiC/ZrSiO4-SiO2 composite coatings were prepared on carbon/carbon(C/C) composites by combining pack cementation and slurry painting method to improve the oxidation resistance and decrease the infrared emissivity. The phase compositions and microstructures of the as-prepared coatings were characterized by XRD, SEM and EDS. The oxidation resistance of the SiC/ZrSiO4-SiO2 coatings were evaluated in dynamic air (air flow rate: 0.6 L/min) at 1400℃ and 1500℃, respectively. The infrared emissivity of the SiC/ZrSiO4-SiO2 coatings coated C/C samples were also investigated at 90℃ and 500℃, respectively. The results show that the composite coatings which are composed of SiC inner coating with loose structure and ZrSiO4-SiO2 outer coating with mosaic structure exhibit excellent oxidation resistance and can protect C/C matrix from oxidation for long time. The mass loss rates of the SiC/ZrSiO4-SiO2 coatings coated samples are only 0.124% and 0.03% in dynamic air at 1400℃ and 1500℃ after 55h oxidation, respectively. The infrared emissivity of C/C composites can be decreased by coated SiC/ZrSiO4-SiO2 composite coatings, and the infrared emissivity descends with the temperature increasing. The average infrared emissivity of the coated C/C samples in 3~5μm and 8~14μm at 90℃ are 0.55 and 0.66, respectively. And the average infrared emissivity in 3~5μm and 8~14μm at 500℃ are 0.48 and 0.62, respectively. From the anti-oxidation and infrared emissivity property point of view, the C/C composites coated SiC/ZrSiO4-SiO2 coatings may be one of the most promising candidates as high-temperature structural materials applied in the field of aeronautics and astronautics.

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引用本文

周 伟,肖 鹏,李 杨,罗 威.炭/炭复合材料表面SiC/ZrSiO4-SiO2复合涂层的抗氧化性能与红外发射特性研究[J].稀有金属材料与工程,2017,46(11):3479~3484.[ZHOU Wei, XIAO Peng, LI Yang, LUO Wei. The anti-oxidation and infrared emissivity property of SiC/ZrSiO4-SiO2 composite coatings on carbon/carbon composites[J]. Rare Metal Materials and Engineering,2017,46(11):3479~3484.]
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  • 收稿日期:2015-08-11
  • 最后修改日期:2015-12-17
  • 录用日期:2016-01-14
  • 在线发布日期: 2017-12-13

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