金属Ni修饰的石墨烯及其对等离子喷涂NiCoCrAlY涂层力学性能的影响

doi:10.11896/cldb.20050020

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Abstract In order to solve the problems of easy agglomerate and oxidation at high temperature of graphene (GNPs), in this work, the electroless pla-ting process was employed to modify graphene with metal Ni (Ni@GNPs) and then the plasma spraying technology was used to prepare NiCoCrAlY, NiCoCrAlY + GNPs and NiCoCrAlY + Ni@GNPs coatings on the surface of K465 superalloy. The effects of process factors such as ultrasound-assisted, reaction temperature and reaction time of electroless plating on the graphene modified quality was mainly investigated. The influence of adding Ni@GNPs on the microstructure and mechanical properties of plasma sprayed NiCoCrAlY coatings was further studied. The results showed that after electroless plating, metal Ni coatings were uniformly deposited on the GNPs surface. When the electroless plating reaction was carried out under the condition of assisting ultrasonic reaction at 50 ℃ for 40 min, the modification effect of GNPs was improved. Compared with NiCoCrAlY and NiCoCrAlY + GNPs coatings, adding Ni@GNPs could significantly decrease the pores and cracks of coatings, and enhance the density of coatings, as well as substantially reduce the porosity. Furthermore, the hardness of NiCoCrAlY + Ni@GNPs coatings was increased by 30.9% and the erosion rate was reduced by 7.4% than that of NiCoCrAlY coatings, indicating that the addition of Ni@GNPs could also improve the mechanical property and erosion resistance of NiCoCrAlY coatings.

Key words： plasma spraying graphene electroless plating NiCoCrAlY coating

Published: 04 June 2021

CLC number:

TG174.4

Fund:National Natural Science Foundation of China (51975137).

About author:: Yuhui Zhang received his M.S. degree in 2015 from Harbin Engineering University in Materials and engineering. He is currently a senior engineer in AECC Harbin Dongan Engine Co., Ltd.
Guo Jin, Ph.D., professor of Harbin Engineering University, doctoral tutor. His main research directions are metal material surface protection and treatment technology, ceramic coating, and additive manufacturing.

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	ZHANG Yuhui
	LI Dayan
	YUAN Chenfeng
	JIN Guo
	FANG Yongchao
	ZHANG Dan

Cite this article:

ZHANG Yuhui,LI Dayan,YUAN Chenfeng, et al. Metal Ni Modification of Graphene and Its Effect on Mechanical Properties of Plasma Sprayed NiCoCrAlY Coating[J]. Materials Reports, 2021, 35(10): 10141-10146.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.20050020 OR http://www.mater-rep.com/EN/Y2021/V35/I10/10141

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