Characterization of slurry-based mullite coating deposited on P91 steel welds

Kanwal, Sonu; Thakare, J.G.; Pandey, Chandan; Singh, Inderdeep; Mahapatra, Manas Mohan

doi:10.1007/s41779-018-0258-4

Cited by 14 publications

(5 citation statements)

References 14 publications

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“…Using Table S4 of the Supplementary Materials, Figure S11 illustrates the calculated erosion rates for EB-PVD TC under various presintering treatments under different temperatures, together with experimentally measured erosion [12,54,55].…”

Section: The Calculated Erosion Rate Versus Ratio R Tmentioning

confidence: 99%

Evaluation of Solid Particle Erosion of EB-PVD TBCs under Thermal Cycling Conditions Based on a Stochastic Approach

2023

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The solid particle erosion behavior of electron-beam physical vapor deposition (EB-PVD) thermal barrier coatings (TBCs) was numerically evaluated under thermal cycling conditions. The erosion rates were calculated based on the mechanics-based formulae where the model parameters are fitted to the temperature-process-dependent test data available in the literature. A stochastic approach was applied to simulate the erosion behavior toward service conditions. The mechanics-based formulae were then validated by experimentally measured temperature and sintering-dependent erosion rates from the literature. The pseudoductile erosion behavior is identified for silica particles in the EB-PVD topcoat (TC) erosion system above the intermediate temperatures (~220 °C) due to the softening of partial molten silica particles, thus leading to an increase in the cutting wear and a decrease in deformation wear. The erosion rates are found to decrease versus temperature but increase versus thermal cycles. Such erosion behavior could be attributed to propagation of sintering cracks induced at elevated temperatures. The parametric calculations show that both erosion and thermal cycling parameters have a profound effect on the erosion mechanism of EB-PVD TC. The erosion rate increases at higher solid particle velocity and accumulated mass but displays a pseudoductile erosion behavior versus variation of impacting angles. Two types of erosion mechanisms were evaluated under different thermal cycling conditions. Under the burner cycling test with a short high-temperature dwell period, the erosion mechanism of EB-PVD TBCs is governed by temperature, while under an isothermal cycling test with a high-temperature long dwell period, the erosion is determined by sintering time. The failure mechanisms of EB-PVD TBCs under solid particle erosion processes are discussed combining internal cracking within topcoat and external erosion on the surface of topcoat.

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Section: The Calculated Erosion Rate Versus Ratio R Tmentioning

confidence: 99%

Evaluation of Solid Particle Erosion of EB-PVD TBCs under Thermal Cycling Conditions Based on a Stochastic Approach

2023

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“…The four major effects of HEAs allow for superior properties such as wear and corrosion resistance as well as oxidation resistance [9][10][11][12][13][14][15][16][17][18][19][20]. Surface coatings are used to protect and enhance the life of structural components in adverse operating conditions [21][22][23]. The application of HEAs as coating materials is a major direction for the development of HEAs.…”

Section: Introductionmentioning

confidence: 99%

Progress on New Preparation Methods, Microstructures, and Protective Properties of High-Entropy Alloy Coatings

Zhu

et al. 2022

Coatings

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Currently, the preparations of high-entropy alloy (HEA) coatings have developed into new methods such as thermal spraying, electrospark deposition technology, and magnetron sputtering. The microstructures and protective properties of HEA coatings prepared by different methods are bound to be different. Moreover, because HEAs have a wide range of composition systems, the difference in composition will inevitably lead to a change in process parameters and post-treatment methods, and then affect the microstructures and protective properties. This paper introduces the working mechanism of thermal spraying, electrospark deposition technology, and magnetron sputtering, compares the advantages and disadvantages of each method, and focuses on the influences of the compositions, process parameters, and post-treatment process on the microstructures and properties of the coating. Furthermore, this paper outlines the correlation between preparation methods, process parameters, microstructures, and properties, which will provide a reference for further development of the application of high-entropy alloy coatings. On this basis, the future development direction of HEA coatings is prospected.

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“…The test results showed that the durability of Mullite coating is significantly better than Zirconia coating. Kanwal, Sonup [16] investigated the corrosion behavior of Mullite coating. In this study, the coating had no cracks after 20 cycles of cyclic oxidation at 700 • C. Ramaswamy, P [17] conducted thermal shock tests on Mullite coating.…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Mullite Coated Piston Used in a Diesel Engine

et al. 2022

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Due to special working conditions, diesel engines often need to run stably for a long time at high power operating conditions. As the core of diesel engine moving parts, the piston needs to be exposed to high temperature for a long time. Based on the problem of excessive piston temperature at the maximum power point of a certain type of diesel engine, this paper discussed the protective effect of using different thicknesses of Mullite thermal barrier coating on the top surface of the piston, by using the method of hardness plug temperature measurement and three-dimensional simulation. When the thickness of the ceramic coating was increased from 0.2 to 0.7 mm, the maximum temperature of the piston seat decreased from 358.6 to 338.9 °C. This showed that the use of Mullite thermal barrier coating could reduce the working temperature of the aluminum alloy piston at the maximum load operating point, and greatly improve the reliability of engine components.

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Characterization of slurry-based mullite coating deposited on P91 steel welds

Cited by 14 publications

References 14 publications

Evaluation of Solid Particle Erosion of EB-PVD TBCs under Thermal Cycling Conditions Based on a Stochastic Approach

Evaluation of Solid Particle Erosion of EB-PVD TBCs under Thermal Cycling Conditions Based on a Stochastic Approach

Progress on New Preparation Methods, Microstructures, and Protective Properties of High-Entropy Alloy Coatings

Thermal Analysis of Mullite Coated Piston Used in a Diesel Engine

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