高温防护涂层与单晶高温合金界面互扩散行为研究进展

doi:10.7527/S1000-6893.2025.33203

Abstract

Abstract: The interdiffusion behavior at the interface between high-temperature protective coatings and single-crystal superalloys is a critical issue affecting the service life and reliability of aircraft engine turbine blades. With the continuous increase in turbine inlet temperatures of aircraft engines, the elemental interdiffusion between coatings and single-crystal superalloys has become particularly serious. This article systematically reviews the interdiffusion process between single-crystal superalloy and high temperature protective coating systems, clarifying the formation mechanisms of the interdiffusion zone (IDZ), substrate diffusion zone (SDZ), and secondary reaction zone (SRZ). The influencing factors and laws of the interdiffusion behavior and mechanical properties of coatings/single crystal superalloys were explored from the perspectives of single crystal composition, orientation, thermal-mechanical coupling environment, and thin-wall effect of single crystal superalloys. Additionally, it provides a comprehensive evaluation of research progress and existing challenges in interface control methods for various coatings/superalloys, along with proposed design strategies and future development directions.

Key words: High-Temperature Protective Coatings, Single-Crystal Superalloys, Inter-diffusion Behavior, Interdiffusion zone（IDZ）, Substrate Diffusion Zone（SDZ）, Secondary Reaction Zone（SRZ）, Diffusion resistant coating

CLC Number:

References

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Research Progress on Inter-diffusion Behavior at the Interface Between High-Temperature Protective Coatings and Single-Crystal Superalloys

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