The cyclic oxidation resistance behavior of mult-NiCrAlY(YSZ) coatings
DOI:
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Affiliation:
Department of Corrosion and Protection, Northwest Institute For Non-ferrous Metal Reasearch
Clc Number:
TG174.44
Fund Project:
The National Natural Science Foundation of China (51501155)
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Abstract:
In this article, the N5/YSZ/NiCrAlY/( NiCrAlY+YSZ) /NiCrAlY/( NiCrAlY+YSZ) coatings were prepared on Ni-based single crystal alloy (Rene N5) by electron beam physical vapor deposition (EB-PVD). And the sampes were exposed to isothermal oxidation at 1000℃ for 200h and 500h. The microstructural evolution behavior and the mechanism of interface reaction was investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS). The results suggest that the YSZ layer can form an α-Al2O3 active diffusion barrier layer with a “sandwich” structure to refuse the interdiffusion between substrate and mult-NY coating. And the mult-NY coating was transformed to mixed oxide layers gradually during the prcess of cyclic oxidation.
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[Liu Lintao, Li Zhengxian, Wang Yanfeng, Wang Yifei. The cyclic oxidation resistance behavior of mult-NiCrAlY(YSZ) coatings[J]. Rare Metal Materials and Engineering,2019,48(11):3657~3663.] DOI:[doi]