Hot corrosion behavior of Al2O3 + Sm2SrAl2O7 composite thermal barrier coatings

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dc.contributor.authorJoseph, F.J.
dc.contributor.authorArya, S.B.
dc.contributor.authorTailor, S.
dc.date.accessioned2026-02-04T12:27:29Z
dc.date.issued2022
dc.description.abstractRare earth-based samarium strontium aluminate (Sm<inf>2</inf>SrAl<inf>2</inf>O<inf>7</inf>) powder has been synthesized in the laboratory through molten salt synthesis and Al<inf>2</inf>O<inf>3</inf> + Sm<inf>2</inf>SrAl<inf>2</inf>O<inf>7</inf> (SSA) thermal barrier coatings have been developed on an Inconel 718 superalloy substrate by atmospheric plasma spraying technique. The microstructures and surface morphologies of the samples before and after the hot corrosion tests in 50 wt% Na<inf>2</inf>SO<inf>4</inf> + 50 wt% V<inf>2</inf>O<inf>5</inf> (aviation atmosphere) and 90 wt% Na<inf>2</inf>SO<inf>4</inf> + 5 wt% V<inf>2</inf>O<inf>5</inf> + 5 wt% NaCl (marine atmosphere) at 700°C and 900°C were examined. It is observed that samples exposed to marine conditions exhibited 14.5% and 11.6% lower lifetime than the samples exposed to aviation conditions at 700°C and 900°C, respectively, due to significant chlorides attack. © 2022 Wiley-VCH GmbH.
dc.identifier.citationMaterials and Corrosion, 2022, 73, 12, pp. 2004-2008
dc.identifier.issn9475117
dc.identifier.urihttps://doi.org/10.1002/maco.202213401
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/22291
dc.publisherJohn Wiley and Sons Inc
dc.subjectAlumina
dc.subjectAluminum oxide
dc.subjectAtmospheric corrosion
dc.subjectComposite coatings
dc.subjectCorrosion resistant coatings
dc.subjectCorrosive effects
dc.subjectHigh temperature corrosion
dc.subjectPlasma spraying
dc.subjectPowder coatings
dc.subjectRare earths
dc.subjectSodium Aluminate
dc.subjectSodium chloride
dc.subjectSodium sulfate
dc.subjectSprayed coatings
dc.subjectStrontium compounds
dc.subjectVanadium pentoxide
dc.subjectAtmospheric plasma-spraying
dc.subjectCorrosion behaviour
dc.subjectExposed to
dc.subjectHot corrosion
dc.subjectInconel 718 superalloys
dc.subjectMolten salts synthesis
dc.subjectRare-earths
dc.subjectSamarium strontium aluminate
dc.subjectSuperalloy substrates
dc.subjectSynthesised
dc.subjectThermal barrier coatings
dc.titleHot corrosion behavior of Al2O3 + Sm2SrAl2O7 composite thermal barrier coatings

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