Processing and Advancements in the Development of Thermal Barrier Coatings: A Review

Mehta, Amrinder; Vasudev, Hitesh; Singh, Sharanjit; Prakash, Chander; Saxena, Kuldeep K.; Linul, Emanoil; Buddhi, D.; Xu, Jinyang

doi:10.3390/coatings12091318

Cited by 68 publications

(15 citation statements)

References 153 publications

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“…Thermal spray coatings performs crucially in protecting slurry pumps from erosion and corrosion wear [6, 9,[18][19][20][21][22][23][24][25][26][27][10][11][12][13][14][15][16][17]. High-Velocity Oxy-Fuel (HVOF) coatings are thermal spray coatings that provide a dense and hard surface to save the steels and alloys from the abrasive nature of slurry uids.…”

Section: Introductionmentioning

confidence: 99%

Neural computing of slurry erosion of Al2O3-13TiO2 thermal spray HVOF coating for mining pump

Singh

Vasudev

Chohan

2023

Int J Interact Des Manuf

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The purpose of this research was to investigate the cause of a slurry erosion failure in an Al 2 O 3 -13TiO 2 high-velocity oxygen-fuel coating for SS316L steel. Sand particles served as the erodent in this investigation of wear and erosion. The slurry erosion of SS and HVOF Al 2 O 3 -13TiO 2 coating was shown to be signi cantly affected by speed of particles, concentration (wt.%), and exposure period. All characteristics, excluding impingement angle, contribute to faster wear on the parent material, both bare and coated AISI 316L. Coatings were used to slow down the pace at which the source material deteriorated. As a whole, the Al 2 O 3 -13TiO 2 HVOF coating enhanced the AISI 316L's resistance to erosion by 13.73 percent.

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Section: Introductionmentioning

confidence: 99%

Neural computing of slurry erosion of Al2O3-13TiO2 thermal spray HVOF coating for mining pump

Singh

Vasudev

Chohan

2023

Int J Interact Des Manuf

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“…Thermal barrier coatings (TBCs) are commonly employed in the high-temperature regions of gas turbine engines, including the combustion chamber and blades, with the primary objective of prolonging the operational life of metallic components and safeguarding them against degradation caused by deterioration due to elevated temperatures [1][2][3][4][5]. TBCs consist of a fundamental composition comprising a metallic substrate, typically constructed from a nickel-based superalloy.…”

Section: Introductionmentioning

confidence: 99%

Hot Corrosion Behavior of Single-Layered Gd2Zr2O7, Sm2Zr2O7, and Nd2Zr2O7 Thermal Barrier Coatings Exposed to Na2SO4 + MgSO4 Environment

et al. 2023

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Zirconates of rare earth elements have emerged as promising candidates for thermal barrier coatings (TBC). This study investigates the hot corrosion resistance of single-layered ceramic coatings composed of Gd2Zr2O7, Sm2Zr2O7, and Nd2Zr2O7. The coatings were prepared using air plasma spraying and applied to an Inconel [IN] 625 substrate. Experimental assessments were conducted to examine the hot corrosion behaviour by subjecting the coatings to pure magnesium sulfate (MgSO4) salt at 1000 °C for 24 h and a 50/50 mole percent Na2SO4 and MgSO4 mixture at 900 °C for cyclic durations of 5, 10, 15, and 20 h. This combination of salts creates a highly corrosive environment. This short test was carried out due to the necessity of the initial stages of the destruction process characterization. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersion spectroscopy (EDS) techniques were utilized to identify and analyse the reaction products. At 1000 °C, no chemical reaction products were observed between MgSO4 and Gd2Zr2O7, Sm2Zr2O7, and Nd2Zr2O7. However, in the presence of the MgSO4 + Na2SO4 mixture, the zirconate coatings reacted, resulting in the formation of reaction products such as Gd(SO4)3, Gd2O2SO4, Gd2O3, Sm2O2SO4, Sm2(SO4)3, Sm2O3, MgO, Nd2(SO4)3, Na2O, and m-ZrO2. These compounds are formed due to the interaction of rare earth oxides with a low-temperature-melting eutectic Na2SO4+ (3MgSO4 × Na2SO4) melted at 666 °C. Despite the aggressive nature of the corrosive environment, the decomposition of rare earth zirconates was relatively limited, indicating satisfactory resistance to hot corrosion. Among the zirconate systems studied, Gd2Zr2O7 exhibited the lowest resistance to the MgSO4 + Na2SO4-based corrosive environment, while Sm2Zr2O7 and Nd2Zr2O7 demonstrated better corrosion resistance.

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“…Superalloy-based components reached their limit in terms of thermomechanical performances, even if protected by cooling systems and thermal barrier coatings (TBCs) [3,4]. For this reason, there is an increasing interest in high-performance ceramic materials able to meet highly demanding performance criteria.…”

Section: Introductionmentioning

confidence: 99%

Ytterbium Disilicate/Monosilicate Multilayer Environmental Barrier Coatings: Influence of Atmospheric Plasma Spray Parameters on Composition and Microstructure

Di Iorio,

Paglia,

Pedrizzetti

et al. 2023

Coatings

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SiC/SiC ceramic matrix composites (SiCf/SiC CMCs) are regarded as the new materials for the hot-section components of aircraft gas turbine engines, since they have one-third of the density of metallic superalloys, a higher temperature capability, good mechanical strength, and excellent thermal shock resistance. However, high-temperature water-vapor-rich combustion gases can induce severe surface recession phenomena in SiC/SiC leading to component failure. For this reason, it is necessary to design protective coatings, i.e., environmental barrier coatings (EBCs), able to protect the SiC/SiC surface in combustion environments. In the present work, ytterbium monosilicate (Yb2SiO5), stable when exposed to water vapor at high temperatures, and ytterbium disilicate (Yb2Si2O7), characterized by a thermal expansion coefficient closer to that of the substrate, were selected for a multilayer EBC system. EBCs were processed using the atmospheric plasma spray (APS) technique. A set of deposition parameters were tested, varying the power of the torch, and the composition and microstructure of the deposited coatings were studied in terms of porosity, crack density, and post-deposition phase retention by performing SEM, EDS, and XRD analysis. The results allow for the definition of the influence of deposition parameters on the final properties of multilayer EBC coatings.

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Processing and Advancements in the Development of Thermal Barrier Coatings: A Review

Cited by 68 publications

References 153 publications

Neural computing of slurry erosion of Al2O3-13TiO2 thermal spray HVOF coating for mining pump

Neural computing of slurry erosion of Al2O3-13TiO2 thermal spray HVOF coating for mining pump

Hot Corrosion Behavior of Single-Layered Gd2Zr2O7, Sm2Zr2O7, and Nd2Zr2O7 Thermal Barrier Coatings Exposed to Na2SO4 + MgSO4 Environment

Ytterbium Disilicate/Monosilicate Multilayer Environmental Barrier Coatings: Influence of Atmospheric Plasma Spray Parameters on Composition and Microstructure

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