航空学报 > 2024, Vol. 45 Issue (3): 428842-428842   doi: 10.7527/S1000-6893.2023.28842

CVD-SiC阵列结构对ZrB2/SiC涂层抗烧蚀性影响

高志廷1,2, 马壮1,2, 柳彦博1,2()   

  1. 1.北京理工大学 材料科学与工程学院,北京 100081
    2.北京理工大学 重庆创新中心,重庆 401120
  • 收稿日期:2023-04-10 修回日期:2023-05-16 接受日期:2023-06-26 出版日期:2023-07-11 发布日期:2023-07-11
  • 通讯作者: 柳彦博 E-mail:boobbyy@163.com
  • 基金资助:
    国家重点研发计划(2022YFE0121200);国家自然科学基金(51772027)

Effect of CVD-SiC array structure on ablation resistance of ZrB2/SiC coatings

Zhiting GAO1,2, Zhuang MA1,2, Yanbo LIU1,2()   

  1. 1.School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China
    2.Chongqing Innovation Center,Beijing Institute of Technology,Chongqing 401120,China
  • Received:2023-04-10 Revised:2023-05-16 Accepted:2023-06-26 Online:2023-07-11 Published:2023-07-11
  • Contact: Yanbo LIU E-mail:boobbyy@163.com
  • Supported by:
    National Key Research and Development Program(2022YFE0121200);National Natural Science Foundation of China(51772027)

摘要:

采用飞秒激光在化学气相沉积(CVD)-SiC中间层表面制备不同尺寸的阵列,研究了阵列结构对ZrB2/SiC涂层性能的影响。结果表明,随着激光刻蚀频次的增大,阵列结构的深度从30 µm增大到150 µm。采用氧乙炔烧蚀600 s,ZrB2/SiC涂层烧蚀表面温度随CVD-SiC微结构深度增大而逐步降低,最低的表面温度达到1 700 °C,下降了约200 ℃。烧蚀中心区域的颜色从白色过渡到浅灰色。对于激光刻蚀频次为5的试样,在600 s的单次烧蚀后,质量烧蚀率和线性烧蚀率分别为-7.4 × 10-5 g/s和-13.3 µm/s。阵列结构增大了ZrB2/SiC涂层与CVD-SiC中间层的接触面积,从而增强了导热性能,减少了热积聚,进而改善了ZrB2/SiC涂层的抗烧蚀性能。

关键词: 阵列结构, 烧蚀, 等离子喷涂, C/C复合材料, CVD-SiC, 激光刻蚀

Abstract:

Influence of array structure on the performance of ZrB2/SiC coatings was studied by using femtosecond laser to prepare arrays with different sizes on the surface of the Chemical Vapor Deposition (CVD)-SiC interlayer. Results showed that with the increase of laser etching frequency, the depth of the array structure increased from 30 μm to 150 μm. After 600 s of oxyacetylene combustion, the surface temperature of the ZrB2/SiC coating decreased gradually with the increase of CVD-SiC microstructure depth, and the lowest surface temperature reached 1 700 ℃, which decreased by nearly 200 ℃. The color of the combustion center area transitioned from white to light gray. For the samples with an etching frequency of 5 times, after a single cycle of 600 s, the mass combustion rate and linear combustion rate were -7.4 × 10-5 g/s and -13.3 μm/s respectively. The array structure increased the contact area between the ZrB2/SiC coating and the CVD-SiC interlayer, thereby increasing the thermal conductivity, reducing heat accumulation, and ultimately enhancing the anti-combustion performance of the ZrB2/SiC coating.

Key words: array structure, ablation, plasma spraying, C/C composite materials, CVD-SiC, laser etching

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