Method for preparing surface high-entropy metallized layer to assist brazing of large-size ceramic matrix composite and niobium joint based on Joule thermal shock
By using Joule thermal shock on the surface of the C/SiC composite material, the residual stress problem caused by CTE differences during the brazing process is solved, and the high strength and toughness of the joint is achieved, which is suitable for high temperature environments.
Patent Information
- Application Number
- CN202510034964.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2045-01-09
AI Technical Summary
The difference in CTE between C/SiC composite and niobium leads to greater residual stress during the brazing process, affecting the fatigue life and safety and reliability of the joint.
The method of preparing the surface high-entropy metallization layer based on Joule thermal shock is adopted. By depositing a high-entropy alloy layer on the surface of C/SiC composite materials, a stress buffer zone is formed, residual stress is reduced, and weld structure is optimized.
It effectively alleviates the problem of the difference in thermal expansion coefficient between ceramics and metals, reduces the residual stress of the joint, improves the toughness and strength of the joint, extends the fatigue life, and is suitable for high-temperature conditions.