Microstructural characterisation of oxide formation from MCrAlY coatings on nickel-based superalloys

West, Geoff; Pace, Michael T.; Thomson, Rachel C.

doi:10.3184/096034009x464168

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…When turbine blades are in long-term use, oxidation between coating interfaces caused by thermal shock and gas contamination, the mismatch between the expansion coefficients of the layers, and molten salt corrosion can lead to coating failure. [1][2][3][4][5] If the failed coatings on the blades are not cleaned and repainted in time, the blades will not work properly. Laser cleaning has the advantages of controllability, low operating cost, and less pollution.…”

Section: Introductionmentioning

confidence: 99%

“…Thermal barrier coatings (TBCs) are now widely used in aircraft engines. When turbine blades are in long-term use, oxidation between coating interfaces caused by thermal shock and gas contamination, the mismatch between the expansion coefficients of the layers, and molten salt corrosion can lead to coating failure 1 – 5 If the failed coatings on the blades are not cleaned and repainted in time, the blades will not work properly.…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of millisecond laser removal of thermal barrier coatings based on volume of fluid method

et al. 2022

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. A three-dimensional numerical model was established based on the volume of fluid method. The thermal-fluid process in the laser cleaning thermal barrier coatings is analyzed in detail. The effect of scanning speed on the cleaning process was investigated by tracing the migration position of the air-coating phase interface, with consideration of gravity and vapor impact pressure. It was demonstrated that phase change of the zirconia coating is dominated by the vaporization-evaporation process when it is ablated by a millisecond laser; the ablation process of the C263 alloy substrate is a solidification-melting process. The bulge at the edge of the gully will affect the morphology of the gully by influencing the temperature distribution.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical simulation of millisecond laser removal of thermal barrier coatings based on volume of fluid method

et al. 2022

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Non-parabolic isothermal oxidation kinetics of low pressure plasma sprayed MCrAlY bond coat

Zhang

Yang

2017

Applied Surface Science

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The non-parabolic isothermal oxidation kinetics of low pressure plasma sprayed MCrAlY bond coat was investigated. To qualitatively explain the abnormal growth phenomenon of thermally grown oxides (TGO), the changes that occurred to their microstructure during the oxidation process were studied.Based on these observations, a modified model was developed to understand and quantitatively predict the non-parabolic oxidation and growth kinetics of TGO. This modified model, which fits well with experimental results, provides a novel method to quantitatively predict the long-term growth behaviour of TGO, and thereby benefits the development of long-life and highly reliable thermal barrier coatings.

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Additive laser deposition of compositionally graded NiCrAlY-YSZ multi-materials on IN625-NiCrAlY substrate

Savitha¹,

Reddy

Singh

et al. 2020

Materials Characterization

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Microstructural characterisation of oxide formation from MCrAlY coatings on nickel-based superalloys

Cited by 5 publications

References 9 publications

Numerical simulation of millisecond laser removal of thermal barrier coatings based on volume of fluid method

Numerical simulation of millisecond laser removal of thermal barrier coatings based on volume of fluid method

Non-parabolic isothermal oxidation kinetics of low pressure plasma sprayed MCrAlY bond coat

Additive laser deposition of compositionally graded NiCrAlY-YSZ multi-materials on IN625-NiCrAlY substrate

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