Studies on the role of HVOF coatings to combat erosion in turbine alloys

Prasanna, N. D.; Siddaraju, C.; Shetty, Gagan; Рамеш, М. Р.; Reddy, G. Madhu Sudana

doi:10.1016/j.matpr.2018.01.119

Cited by 29 publications

(12 citation statements)

References 2 publications

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“…[34][35][36] It is reported that the density, bond strength, and cohesion strength of HVOF-sprayed coatings are better than the coatings produced using other thermal spray techniques. 37,38 Ceramic and ceramic-based composite coatings can be used in various applications where protection against wear, oxidation, and corrosion at high temperatures and pressures 39 are desired. The literature suggests that ceramic-based coatings/films can be deposited using techniques like atomic layer deposition, micro-arc alloying, or the sol-gel method.…”

Section: Introductionmentioning

confidence: 99%

Development of Al₂O₃-based hybrid ceramic matrix composite coating to mitigate the erosive wear of advanced steel

Gupta

Kumar

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Steels are susceptible to surface- and subsurface-related degradations (e.g. corrosion and wear) depending upon the working environment; however, desired properties can resolve these issues. The authors have selected the high-velocity oxygen-fuel process to develop alumina-based composite coatings on ASME SA 387 GR22 CL2 steel. The coating material chosen comprises ceria and hexagonal boron nitride as the reinforcements. The metallurgical characteristics of coatings are recorded using X-ray diffraction and scanning electron microscopy. Mechanical properties are mapped using a nano-indenter; and an air jet erosion test rig is used to evaluate erosion wear response. Improvements in the mechanical properties and erosive wear resistance of the hybrid coating are attributed to microstructural changes and the generation of new phases. The values of [Formula: see text], [Formula: see text], and [Formula: see text] are used to develop the mechanistic understanding of coatings’ erosion behavior. Splat cracking and splat detachment are the observed erosion wear mechanisms.

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Section: Introductionmentioning

confidence: 99%

Development of Al₂O₃-based hybrid ceramic matrix composite coating to mitigate the erosive wear of advanced steel

Gupta

Kumar

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Thanks to these advantageous characteristics, Ti-6Al-4V has emerged as a powerful alloy for a wide field of applications. In addition to its wide use in surgical instruments and medical implants, it is currently used as a material for aerospace components (i.e., engine compressor blades and disks and helicopter rotor blades) [ 7 , 8 , 9 ], marine and offshore components (i.e., marine ship hulls, propellers, tubes, and shells) [ 1 , 10 , 11 ], oil and wastewater systems components (i.e., valves, pipelines, pipe fittings, and pumps) [ 12 , 13 , 14 ], hydropower plant components (i.e., turbine blades, pumps) [ 15 , 16 , 17 ], and architectural cladding and roofing [ 11 ]. These components are typically exposed to slurry erosion, where the working surfaces are continuously impacted by a stream of a slurry mixture.…”

Section: Introductionmentioning

confidence: 99%

Slurry Erosion–Corrosion Characteristics of As-Built Ti-6Al-4V Manufactured by Selective Laser Melting

2020

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Erosion and erosion–corrosion tests of as-built Ti-6Al-4V manufactured by Selective Laser Melting were investigated using slurries composed of SiO2 sand particles and either tap water (pure water) or 3.5% NaCl solution (artificial seawater). The microhardness value of selective laser melting (SLM)ed Ti-6Al-4V alloy increased as the impact angle increased. The synergistic effect of corrosion and erosion in seawater is always higher than erosion in pure water at all impact angles. The seawater environment caused the dissolution of vanadium oxide V2O5 on the surface of SLMed Ti-6Al-4V alloy due to the presence of Cl− ions in the seawater. These findings show lower microhardness values and high mass losses under the erosion–corrosion test compared to those under the erosion test at all impact angles.

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“…Typically, fibers ceramic matrices are commonly used in exhaust structures in these turbines, presenting irregular and low hardness surfaces, which generate insufficient resistance to wear and erosion 6,7 . Thus, it is necessary to develop ceramic substrates that serve as protective covers for these materials 8,9 …”

Section: Introductionmentioning

confidence: 99%

Incorporating sugarcane bagasse ash into Al₂O₃ ceramic tapes

Silva

Alves

Freitas

et al. 2020

Int J Applied Ceramic Tech

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High-temperature co-fired ceramic (HTCC) technology has attracted increasing attention due to its cost-benefit ratio and excellent working capacity in adverse temperature environments, 1,2,3 applying to components of gas turbine engines for high-temperature aircraft. 4,5 Typically, fibers ceramic matrices are commonly used in exhaust structures in these turbines, presenting irregular and low hardness surfaces, which generate insufficient resistance to wear and erosion. 6,7 Thus, it is necessary to develop ceramic substrates that serve as protective covers for these materials. 8,9 We commonly use alumina ceramic matrices as the material for substrates and packages because of their excellent mechanical and thermal properties, high dielectric strength, high resistivity, and thermal and chemical stability. 10,11 However, the use of pure alumina nanoparticles is limited for this purpose, considering that its sintering temperature for dense bodies occurs above 1350°C. 12,13 The incorporation of industrial waste such as from the sugarcane bagasse ash (SCBA) into the alumina substrate serves as a flux, decreasing the sintering temperature. 14,15 Generally, waste will have discarded outdoors, causing significant environmental problems, affecting flora, fauna, and people's

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Studies on the role of HVOF coatings to combat erosion in turbine alloys

Cited by 29 publications

References 2 publications

Development of Al₂O₃-based hybrid ceramic matrix composite coating to mitigate the erosive wear of advanced steel

Development of Al₂O₃-based hybrid ceramic matrix composite coating to mitigate the erosive wear of advanced steel

Slurry Erosion–Corrosion Characteristics of As-Built Ti-6Al-4V Manufactured by Selective Laser Melting

Incorporating sugarcane bagasse ash into Al₂O₃ ceramic tapes

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Studies on the role of HVOF coatings to combat erosion in turbine alloys

Cited by 29 publications

References 2 publications

Development of Al2O3-based hybrid ceramic matrix composite coating to mitigate the erosive wear of advanced steel

Development of Al2O3-based hybrid ceramic matrix composite coating to mitigate the erosive wear of advanced steel

Slurry Erosion–Corrosion Characteristics of As-Built Ti-6Al-4V Manufactured by Selective Laser Melting

Incorporating sugarcane bagasse ash into Al2O3 ceramic tapes

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Development of Al₂O₃-based hybrid ceramic matrix composite coating to mitigate the erosive wear of advanced steel

Development of Al₂O₃-based hybrid ceramic matrix composite coating to mitigate the erosive wear of advanced steel

Incorporating sugarcane bagasse ash into Al₂O₃ ceramic tapes