Anti-ablation ZrC/SiC multilayer alternate coating and preparation method thereof

An anti-ablation and coating technology, applied in coating, metal material coating process, gaseous chemical plating, etc., can solve the problems of coating failure, difficulty in resisting high scouring force, etc., to protect the substrate and realize thermal stress Matching and reducing the effect of penetrating cracks
CN113106416APending Publication Date: 2021-07-13NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWESTERN POLYTECHNICAL UNIV
Publication Date
2021-07-13

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Abstract

The invention relates to an anti-ablation ZrC / SiC multilayer alternate coating and a preparation method. The thermal expansion difference between coatings and a substrate and among coatings can be effectively regulated and controlled through multilayer alternation of SiC and ZrC, meanwhile, the designability of the multi-layer alternate coatings is high, and thermal stress matching of the coatings and the substrate can be better achieved by adjusting the thickness and the number of the SiC layers and the ZrC layers, on the other hand, after the multiple layers are compounded, a large number of interlayer interfaces can exist, cracks can be deflected or terminated in the expansion process, and therefore generation of penetrating cracks is reduced. In conclusion, according to the anti-ablation ZrC / SiC multilayer alternate coating and the preparation method thereof, the coatings provided by the invention can effectively improve the ablation resistance, and the substrate can be better protected.
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Description

technical field

[0001] The invention belongs to the field of coating preparation, and relates to an anti-ablation ZrC / SiC multilayer alternating coating and a preparation method. Background technique

[0002] Carbon / carbon (C / C) composites have the characteristics of low density, excellent high-temperature and ultra-high-temperature mechanical properties, good thermal stability, and strong chemical resistance, making them ideal candidates for aerospace thermal structural components. However, C / C composites begin to oxidize in an aerobic environment above 400°C, and ablate at higher temperatures and high-velocity gas, which seriously restricts their reliable application in high-temperature extreme environments.

[0003] The preparation of anti-oxidation and ablation ceramic coatings on the surface of C / C composites is an internationally recognized inevitable way to solve this problem. The melting point of ZrC ceramics is as high as 3540 °C, and its oxide ZrO 2 Its melting p...

Claims

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