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Effect of microstructure on early oxidation of MCrAlY coatings

Ying Chen, Xiaofeng Zhao

2018enmcralyoxidationmicrostructurecoatings

Abstract

Language:

Two MCrAlY coatings with the same nominal composition but different microstructures are deposited onto Hastelloy® X superalloy substrates by low pressure plasma spraying (LPPS) and high velocity oxygen fuel (HVOF) spraying, respectively. The early oxidation behaviour of the coatings at 1150 °C is studied. For the LPPS coating with relatively coarse grains, the γ and β-phase show different oxidation behaviours: the oxide on the γ phase exhibits a multi-layer structure, consisting of outer (Ni,Co)(Cr,Al)2O4, intermediate (Cr,Al)2O3, and inner α-Al2O3. The oxidation of the β-phase reveals distinct characteristics, indicating the influence of microstructural differences on the oxidation performance of these coatings. This research provides valuable insights into the microstructural effects that govern the early oxidation mechanisms of MCrAlY coatings, which are critical for their application in high-temperature environments.

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Cite This Work

@article{e09d250f-af98-4a03-a7fd-b28c6a2962cd,
  title={Effect of microstructure on early oxidation of MCrAlY coatings},
  author={Ying Chen and Xiaofeng Zhao},
  year={2018},
  language={en}
}
TY  - JOUR
TI  - Effect of microstructure on early oxidation of MCrAlY coatings
AU  - Ying Chen
AU  - Xiaofeng Zhao
PY  - 2018
LA  - en
ER  -

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