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Hot corrosion behavior of solution precursor and atmospheric plasma sprayed thermal barrier coatings
2015 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 98, p. 271-279Article in journal (Refereed) Published
Abstract [en]

Hot corrosion behavior of solution precursor plasma spray (SPPS) thermal barrier coating (TBC) in molten salt mixtures of 90wt.% Na<inf>2</inf>SO<inf>4</inf>+5wt.% V<inf>2</inf>O<inf>5</inf>+5wt.% NaCl and 50wt.% Na<inf>2</inf>SO<inf>4</inf>+50wt.% V<inf>2</inf>O<inf>5</inf> at 900°C is compared vis-à-vis atmospheric plasma spray (APS) coating. APS TBCs show better hot corrosion resistance than SPPS TBCs in both the salt mixtures. The vertical cracks in SPPS coatings, meant for strain tolerance and high thermal cycling life, serve as channels for transporting salts across the coating to bond coat/top coat interface and accelerate failure. © 2015 Elsevier Ltd.

Place, publisher, year, edition, pages
Elsevier Ltd , 2015. Vol. 98, p. 271-279
Keywords [en]
Ceramic, Hot corrosion, SEM, Superalloys, XRD, Coatings, Corrosion, Corrosion resistance, Corrosive effects, Mixtures, Plasma jets, Plasma spraying, Salt deposits, Sprayed coatings, Surface plasmon resonance, A. Ceramic, Atmospheric plasma spray, Atmospheric plasmas, Hot corrosion resistance, Molten salt mixtures, Thermal barrier coating (TBC), Thermal barrier coatings
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:hv:diva-8410OAI: oai:DiVA.org:hv-8410DiVA, id: diva2:859824
Available from: 2015-10-08 Created: 2015-10-08 Last updated: 2020-11-17Bibliographically approved

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Joshi, Shrikant V.

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