High-Temperature Oxidation Studies of Plasma-Sprayed NiCrAlY/TiO2 and NiCrAlY/Cr2O3/YSZ Cermet Composite Coatings on MDN-420 Special Steel Alloy

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dc.contributor.authorMadhu Sudana Reddy, G.
dc.contributor.authorPrasad, C.D.
dc.contributor.authorShetty, G.
dc.contributor.authorRamesh, M.R.
dc.contributor.authorRao, T.N.
dc.contributor.authorPatil, P.
dc.date.accessioned2026-02-05T09:26:39Z
dc.date.issued2021
dc.description.abstractThe plasma spray process was used to form 70%NiCrAlY + 30%TiO<inf>2</inf> and 70%NiCrAlY + 25%Cr<inf>2</inf>O<inf>3</inf> + 5%YSZ cermet coatings on MDN-420 special steel alloy. Cyclic oxidation testing was conducted on coated and uncoated specimens at 700°C under a static air environment. Thermogravimetric analysis was applied to establish the oxidation kinetics. X-ray diffraction (XRD), scanning electron microscopy (SEM)/energy-dispersive x-ray spectroscopy (EDS), and electron probe microanalysis (EPMA) techniques were used to analyze the oxidized products. The NiCrAlY + Cr<inf>2</inf>O<inf>3</inf> + YSZ coating was found to be most resistive when compared with the NiCrAlY + TiO<inf>2</inf> coating in the aggressive oxidation environment. Net weight loss was observed for bare MDN-420 alloy due to sputtering. The oxidation resistance of the coatings was due to formation of Cr<inf>2</inf>O<inf>3</inf>, NiCr<inf>2</inf>O<inf>4</inf>, NiO, and Al<inf>2</inf>O<inf>3</inf> phases. © 2021, ASM International.
dc.identifier.citationMetallography, Microstructure, and Analysis, 2021, 10, 5, pp. 642-651
dc.identifier.issn21929262
dc.identifier.urihttps://doi.org/10.1007/s13632-021-00784-0
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/23039
dc.publisherSpringer
dc.subjectAlumina
dc.subjectAluminum oxide
dc.subjectCermets
dc.subjectChromium alloys
dc.subjectComposite coatings
dc.subjectElectron probe microanalysis
dc.subjectNickel oxide
dc.subjectOxidation resistance
dc.subjectPlasma jets
dc.subjectPlasma spraying
dc.subjectScanning electron microscopy
dc.subjectSprayed coatings
dc.subjectThermogravimetric analysis
dc.subjectThermooxidation
dc.subjectTitanium dioxide
dc.subjectYttria stabilized zirconia
dc.subjectCermet coatings
dc.subjectCermet composite coating
dc.subjectCyclic oxidation testing
dc.subjectNiCrAlY/cr2O3/YSZ
dc.subjectNiCrAlY/TiO2
dc.subjectPlasma spray process
dc.subjectSpecial steel
dc.subjectSpecial steel alloy
dc.subjectStatic air
dc.subjectThermal spray coatings
dc.subjectAlloy steel
dc.titleHigh-Temperature Oxidation Studies of Plasma-Sprayed NiCrAlY/TiO2 and NiCrAlY/Cr2O3/YSZ Cermet Composite Coatings on MDN-420 Special Steel Alloy

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