GH 783合金和NiCoCrAlYTa涂层的抗氧化性能研究

doi:10.11896/cldb.24060116

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Abstract This work innovatively utilized multi arc ion plating technology to prepare NiCoCrAlYTa coatings on GH 783 alloy. The microstructure of the coatings was characterized by SEM, XRD, and EDX detection methods, and the effect of NiCoCrAlYTa coatings on the high-temperature oxidation behavior of GH 783 alloy was studied. The results show that the prepared NiCoCrAlYTa coating has a dense structure and a thickness of about 30 μm, the main reinforcing phase is Ni₃Al, and the coating structure is rich in Al on the outer layer and Cr on the inner layer. The enrichment of trace element Y in the coating on the surface is beneficial for improving the adhesion of the oxide film, while the enrichment of Ta at the interface between the coating and the substrate is beneficial for enhancing the adhesion of the coating. After adding NiCoCrAlYTa coating, the weight gain trend of GH 783 sample during oxidation at 1 000 ℃ can be slowed down, and the oxidation rate is relatively stable. It can effectively reduce the amount of oxide skin detachment, and improve the overall antioxidant performance of the material from secondary to antioxidant le-vels. The reason why NiCoCrAlYTa coating has excellent high-temperature oxidation resistance is that during the preparation process of NiCoCr-AlYTa coating, Al₂O₃ thin films are generated on the coating surface, which can maintain the presence of the reinforcing phase Ni₃Al in the NiCoCrAlYTa coating.

Key words： high-temperature alloy high-temperature oxidation resistance NiCoCrAlYTa coating oxidation kinetics

Published: 25 July 2025 Online: 2025-07-29

CLC number:

TB35

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	Articles by authors
	CHEN Xiaoping
	TAO Xiancheng
	BAO Ting
	ZHAO Ningning
	LOU Yumin
	YUE Jianling

Cite this article:

CHEN Xiaoping,TAO Xiancheng,BAO Ting, et al. Study on the Oxidation Resistance of GH 783 Alloy and NiCoCrAlYTa Coating[J]. Materials Reports, 2025, 39(14): 24060116-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24060116 OR https://www.mater-rep.com/EN/Y2025/V39/I14/24060116

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