Protection of coated superalloys from erosion in turbomachinery and other systems exposed to particulate flows

Tabakoff, W.

doi:10.1016/s0043-1648(99)00192-1

Cited by 37 publications

(17 citation statements)

References 10 publications

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“…In aero engines and gas turbines many different materials are applied. Whereas in the first stages of the engine the protection against erosion is interesting [1,2], the materials in the afterwards stages like compressor, combustion chamber and turbine are exposed to high temperatures, oxidation and corrosion. State of the art is the use of Ni-based superalloys as material for turbine blades regarding the high temperature resistance and attractive mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Oxidation study of Pt–Al based coatings on γ-TiAl at 950 °C

Ebach-Stahl

Fröhlich

2016

Surface and Coatings Technology

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In the present study, Pt-based aluminide coatings were deposited on γ-TiAl (Ti-45Al-8Nb-0,2C; at.%) by magnetron sputtering and tested under high temperature conditions. The Ptcontent in the layer was varied (40, 50 and 100 at.%) to find an optimized oxidation resistant coating. The Pt-50Al coating showed the best oxidation resistance at 950°C due to the formation of a continuous thin alumina layer on top compared to the fast oxidizing pure Pt and aluminum rich Pt-60Al coatings. Depending on the testing time different Pt-Ti-Al phases were formed below the grown oxide layer which is caused by the outward diffusion of Ti and the inward diffusion of Pt at the interface between coating and base material, respectively. Beside mass gain measurements microstructural examinations were performed via scanning electron microscopy (SEM), energy-dispersive X-Ray spectroscopy (EDS) as well as X-Ray diffractometry (XRD) to study the evolution of phase formation.

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Section: Introductionmentioning

confidence: 99%

Oxidation study of Pt–Al based coatings on γ-TiAl at 950 °C

Ebach-Stahl

Fröhlich

2016

Surface and Coatings Technology

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“…Advantages and limitations of the film coating methods [143]. PVD techniques have enabled the achievement of highly resistant erosion coatings that protect the GTE compressor components and ensure long term reliability and availability, while reducing maintenance and operating costs [132,[154][155][156]. The coatings obtained with PVD techniques have shown considerable erosion resistance when compared to other coating techniques due to the exceptional homogeneous deposition and the elimination of additional treatment on the thickness and surface smoothing, necessary to increase the coating's wear resistance [157].…”

Section: Type Process Anti-erosion Applicationmentioning

confidence: 99%

Solid Particle Erosion Behaviour and Protective Coatings for Gas Turbine Compressor Blades—A Review

et al. 2020

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Gas turbines (GTEs) are often utilised in harsh environments where the GT components, including compressor vanes and rotor blades, are subject to erosion damage by sand and dust particles. For instance, in a desert environment, the rate of damage made by solid particles erosion (SPE) becomes severe, and therefore results in degradation to the GTE parts, lowering the cycle efficiency, reducing the device lifetime, and increasing the overall cost of the operation. As such, understanding the erosion mechanism caused by solid particles and the effects associated with it is crucial for selecting the appropriate countermeasures and maintaining the system performance. This review paper provides a survey of the available studies on SPE effects on GTEs and surface protective coatings. Firstly, the ductile and brittle SPE mechanism is presented, as well as the ductile-brittle transition region. Then, an in-depth focus on the parameters associated with the SPE, such as particles properties and impingement conditions, is introduced. Furthermore, the existing theoretical models are shown and discussed. Afterwards, erosion resistant coating materials for surface protection and their selection criteria are covered in the review. Finally, the gap in knowledge and future research direction in the field of SPE on GTEs are provided.

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“…In many cases, application of protective coatings appears to be the most cost effective option to date [1,2] .But the traditional methods of developing protective coatings through trial-anderror experimentation are time consuming and costly. Finite element (FE) based numerical simulation can be used as a time and cost effective tool to estimate the erosion behavior of components exposed to slurry erosion under different erosion conditions with a limited number of experiments if a suitable erosion mechanism is implemented.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Modeling of Correlating Mechanical Properties with Erosion Wear Rate

Wu¹,

Wu²,

Jin-jie³

2018

Proceedings of the 2018 3rd International Conference on Electrical, Automation and Mechanical Engineering (EAME 2018)

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A finite element display dynamic model was developed to study mechanical properties of single layer coatings under single solid particle impact, simulating particulate erosion conditions. Four coatings on the same material substrate material were analyzed to determine reduction in additional factors influence. The model was used to study the effect of mechanical characteristics such as microhardness, elastic modulus and combination of microhardness and elastic modulus. The result shows that erosion rate of the coatings decreased with an increase of the ratio H 3 /E 2 and H/E.

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Protection of coated superalloys from erosion in turbomachinery and other systems exposed to particulate flows

Cited by 37 publications

References 10 publications

Oxidation study of Pt–Al based coatings on γ-TiAl at 950 °C

Oxidation study of Pt–Al based coatings on γ-TiAl at 950 °C

Solid Particle Erosion Behaviour and Protective Coatings for Gas Turbine Compressor Blades—A Review

Finite Element Modeling of Correlating Mechanical Properties with Erosion Wear Rate

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