Ni-Al-Pt粘结层的制备及微观组织演变分析

doi:10.11896/cldb.19100154

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Abstract The NiAl bond coatings were prepared by atmospheric plasma spraying technology. Then Pt was electroplated on the NiAl bond coatings and vacuum diffusion was performed to prepare the Ni-Al-Pt modified bond coatings with excellent performance. The effects of process parameters such as shot peening, diffusion time and temperature on the morphology and chemical composition of Ni-Al-Pt bond coatings were studied. The phase structure and element distribution of Ni-Al-Pt bond coatings were analyzed. In addition, the average diffusion coefficients of the elements in the Ni-Al-Pt and NiAl bond coatings were calculated, and the diffusion behavior of each element in the bond coatings was analyzed. We found that, shot peening facilitates the diffusion of elements at high temperatures, increasing the temperature will increase the diffusion depth and reduce the Kirkendall hole, extended time also contributes to increased thickness of the bond coatings. The interdiffusion of Pt with Ni and Al occurs mainly in the Ni-Al-Pt bond coatings, formed solid solution of γ-(Ni, Pt) and (Ni, Pt)₃Al. The solid solution of Pt promotes the diffusion of Al while hindering the diffusion of Ni, and increases the oxidation resistance of the bond coatings.

Key words： Ni-Al-Pt microstructure chemical composition plase structure elemental diffusion

Published: 23 February 2021

CLC number:

TG154. 5

Fund:This work was financially supported by the National Natural Science Foundation of China (U1933124).

Corresponding Authors: zyhan@cauc.edu.cn

About author:: Zhiyong Han received his Ph. D. degree in materials science and engineering from the University of Science and Technology Beijing (USTB) in 2004. He is currently a professor of the CAUC. His research interests focus on the interface structure and properties of mate-rials, mainly engaged in theoretical calculations and performance analysis. He has participated in 4 National Natural Science Fund projects and 1 CAAC project and published more than 30 journal papers as the first author, more than 10 of which have been indexed by SCI and EI.

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	HAN Zhiyong
	LU Bowen
	WANG Shicheng

Cite this article:

HAN Zhiyong,LU Bowen,WANG Shicheng. Preparation and Microstructure Evolution of Ni-Al-Pt Bond Coatings[J]. Materials Reports, 2021, 35(4): 4144-4149.

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http://www.mater-rep.com/EN/10.11896/cldb.19100154 OR http://www.mater-rep.com/EN/Y2021/V35/I4/4144

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