A SiC-ZrC co-deposited coating, an anti-ablation composite coating based on the coating and a preparation method thereof

CN122189601APending Publication Date: 2026-06-12NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWESTERN POLYTECHNICAL UNIV
Filing Date
2026-04-08
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing SiC/ZrC alternating coatings are prone to forming macroscopic continuous heterogeneous interfaces under high-temperature environments, leading to thermal mismatch stress, which causes cracks, delamination, and peeling, resulting in poor ablation resistance and interfacial bonding.

Method used

The SiC and ZrC phases were co-deposited using CVD technology to achieve micro-nano scale interpenetrating and mixed distribution, thus preparing a SiC-ZrC co-deposited coating. A ZrC layer was then deposited in a one-step method to form an inner and outer double-layer composite structure.

Benefits of technology

It improves the interfacial bonding strength and ablation resistance of the coating, avoids structural defects such as cracks and delamination, and significantly extends the service life of the substrate in high-temperature ablation environments.

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Abstract

The application discloses a SiC-ZrC co-deposition coating, an anti-ablation composite coating based on the coating and a preparation method of the anti-ablation composite coating, and belongs to the technical field of high-temperature ceramic coatings. In view of the technical defects that the macroscopic continuous heterogeneous interface formed by the continuous stacking of SiC layers and ZrC layers in the SiC / ZrC alternate coating causes thermal mismatch, cracks, delamination and even peeling, the SiC-ZrC co-deposition layer composed of SiC and ZrC micro-nano mixed phases is constructed through a CVD co-deposition process, the macroscopic continuous heterogeneous interface of the alternate coating is disassembled into a micro-nano scale discrete interface, the interface strong continuity is weakened, and the thermal stress concentration problem of the coating system is greatly relieved. Based on this, the ZrC outer layer is directly deposited on the surface of the co-deposition coating by using a one-step method, and the anti-ablation composite coating structure of the SiC-ZrC co-deposition layer and the outer ZrC layer is formed. The composite coating is suitable for a CVD preparation system, can be prepared through a one-step continuous deposition process by simple regulation and control, the preparation method is controllable, and the anti-ablation performance of the coating is significantly improved.
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