Advances in the Regulation and Interfacial Behavior of Coatings/Superalloys
Received date: 2023-06-13
Revised date: 2023-07-03
Online published: 2023-07-25
Supported by
National Natural Science Foundation of China(52101117)
With the continuous increase of turbine inlet temperature of advanced aero-engine, the protective coating technology plays a vital role in improving the oxidation and corrosion resistance of turbine blade materials to ensure the safe performance of turbine blades. However, an intrinsic physical and chemical property mismatch exists between protective coating and superalloy. Interfacial reaction leads to the degradation of interfacial microstructure and mechanical properties. It is the key factor to restrict the application of coating. In this paper, the evolution and diffusion behavior of typical coating/superalloy interface microstructure and its influencing factors are summarized. The influence of interfacial behavior on microstructural stability and mechanical properties of superalloys with coatings is also discussed. The control methods of coating/alloy interface are introduced from three aspects, including the optimization of microstructure composition, design of interfacial diffusion-resistant layer, and development of a new type of interfacial stabilizing coating. Furthermore, the key characteristics of the compatibility of the coating/superalloy interface are summarized, which will promote systematic studies on the effect of the interface on the coating/alloy properties, the combination of multiple methods to control the interface, and the computer-aided coating design.
GONG Shengkai , LIU Yuan , GENG Lilun , RU Yi , ZHAO Wenyue , PEI Yanling , LI Shusuo . Advances in the Regulation and Interfacial Behavior of Coatings/Superalloys[J]. Acta Metall Sin, 2023 , 59(9) : 1097 -1108 . DOI: 10.11900/0412.1961.2023.00257
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