导航

Acta Aeronautica et Astronautica Sinica ›› 2026, Vol. 47 ›› Issue (14): 433203.doi: 10.7527/S1000-6893.2025.33203

• Material Engineering and Mechanical Manufacturing • Previous Articles    

Research progress on interdiffusion behavior at interface between high-temperature protective coatings and single-crystal superalloys

Shanjie YANG1,2, Qian GUO3,4, Qiang ZENG1,2, Hui PENG3,4, Hongbo GUO3,4()   

  1. 1.Gaona Aero Material Co. ,Ltd. ,Beijing 100081,China
    2.High Temperature Materials Research Institute,China Iron and Steel Research Institute,Beijing 100081,China
    3.School of Materials Science and Engineering,Beihang University,Beijing 100191,China
    4.Key Laboratory of High-temperature Structural Materials & Coatings Technology (Ministry of Industry and Information Technology),Beijing 100191,China
  • Received:2025-12-05 Revised:2025-12-18 Accepted:2025-12-24 Online:2026-02-04 Published:2026-02-03
  • Contact: Hongbo GUO E-mail:guo.hongbo@buaa.cn
  • Supported by:
    National Natural Science Foundation of China(U21B2052)

Abstract:

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 high-temperature protective coating and single-crystal superalloys 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 are explored from the perspectives of single-crystal composition, orientation, thermal-mechanical coupling environment, and thin-wall effect of single-crystal superalloys. Additionally, this work reviews recent research advances and identifies persistent challenges associated with interface control methodologies for diverse coating systems and single-crystal superalloys, and proposes targeted design strategies along with prospective directions for future development.

Key words: high-temperature protective coatings, single-crystal superalloys, interdiffusion behavior, Interdiffusion Zone (IDZ), Substrate Diffusion Zone (SDZ), Secondary Reaction Zone (SRZ), diffusion resistant coating

CLC Number: