ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Effect of CVD-SiC array structure on ablation resistance of ZrB2/SiC coatings
Received date: 2023-04-10
Revised date: 2023-05-16
Accepted date: 2023-06-26
Online published: 2023-07-11
Supported by
National Key Research and Development Program(2022YFE0121200);National Natural Science Foundation of China(51772027)
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
Zhiting GAO , Zhuang MA , Yanbo LIU . Effect of CVD-SiC array structure on ablation resistance of ZrB2/SiC coatings[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2024 , 45(3) : 428842 -428842 . DOI: 10.7527/S1000-6893.2023.28842
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