Advances in the Regulation and Interfacial Behavior of Coatings/Superalloys

doi:10.11900/0412.1961.2023.00257

Acta Metall Sin

2023, Vol. 59

Issue (9): 1097-1108 DOI: 10.11900/0412.1961.2023.00257

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Advances in the Regulation and Interfacial Behavior of Coatings/Superalloys

GONG Shengkai¹^,²(

), LIU Yuan³, GENG Lilun⁴, RU Yi¹^,², ZHAO Wenyue¹, PEI Yanling¹, LI Shusuo³

¹Frontier Research Institute of Innovative Science and Technology, Beihang University, Beijing 100191, China
²Tianmu Mountain Laboratory, Hangzhou 311115, China
³Research Institute of Aero-Engine, Beihang University, Beijing 100191, China
⁴School of Materials Science and Engineering, Beihang University, Beijing 100191, China

Cite this article:

GONG Shengkai, LIU Yuan, GENG Lilun, RU Yi, ZHAO Wenyue, PEI Yanling, LI Shusuo. Advances in the Regulation and Interfacial Behavior of Coatings/Superalloys. Acta Metall Sin, 2023, 59(9): 1097-1108.

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Abstract

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.

Key words: superalloy protective coating interfacial diffusion microstructure evolution mechanical property

Received: 13 June 2023

ZTFLH:

TG111.6

Fund: National Natural Science Foundation of China(52101117)

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	GONG Shengkai
	LIU Yuan
	GENG Lilun
	RU Yi
	ZHAO Wenyue
	PEI Yanling
	LI Shusuo

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https://www.ams.org.cn/EN/10.11900/0412.1961.2023.00257 OR https://www.ams.org.cn/EN/Y2023/V59/I9/1097

Fig.1 Sketch map of the effective load-bearing plane position in the coated superalloys with different thermal exposure time (IDZ—interdiffusion zone)

Fig.2 Cross-sectional morphology of the gradient MCrAlY coating

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