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dc.contributor.authorTabeshfar, Mohadese
dc.contributor.authorSalehi, Mehdi
dc.contributor.authorDini, Ghasem
dc.contributor.authorDahl, Paul Inge
dc.contributor.authorEinarsrud, Mari-Ann
dc.contributor.authorWiik, Kjell
dc.date.accessioned2021-09-08T11:59:48Z
dc.date.available2021-09-08T11:59:48Z
dc.date.created2021-01-19T15:08:01Z
dc.date.issued2020
dc.identifier.citationSurface & Coatings Technology. 2020, .en_US
dc.identifier.issn0257-8972
dc.identifier.urihttps://hdl.handle.net/11250/2774631
dc.description.abstractGd2Zr2O7 ceramic is considered as a potential candidate for thermal barrier coatings. Here we present hot corrosion behavior of single layer Gd2Zr2O7 (GZO), Gd2Zr2O7 + 50 wt% YbSZ (GZO/YbSZ), YSZ and double-layer YSZ/Gd2Zr2O7 + 50 wt% YbSZ (YSZ + GZO/YbSZ) coatings prepared by air plasma spraying on Inconel 625 substrates. Prior to hot corrosion the fracture toughness of the coatings was assessed by Vickers indentation showing a variation between 0.6 and 2.3 MPa.m1/2 where the GZO/YbSZ coating exhibited the highest fracture toughness. The hot corrosion test was conducted by exposing the coatings to an equimolar mixture of Na2SO4 and V2O5 at 750 °C. After the hot corrosion test, the type of phases, chemical composition, microstructure and crack formation were investigated. Formation of GdVO4 and YVO4 was observed as the corrosion products in the GZO containing coatings and the YSZ coating, respectively. All coatings showed the formation of monoclinic zirconia after the corrosion test. The Gd2Zr2O7 + 50 wt% YbSZ (GZO/YbSZ) coating showed the best hot corrosion resistance due to reduced reactivity and enhanced fracture toughness and represents a new composition with properties promising for TBC applications.en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.titleHot corrosion of Gd2Zr2O7, Gd2Zr2O7/YbSZ, YSZ+Gd2Zr2O7/YbSZ, and YSZ thermal barrier coatings exposed to Na2SO4+V2O5.en_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber13en_US
dc.source.journalSurface & Coatings Technologyen_US
dc.identifier.doihttps://doi.org/10.1016/j.surfcoat.2020.126718
dc.identifier.cristin1874550
dc.description.localcodeThis article will not be available due to copyright restrictions (c) 2020 by Elsevieren_US
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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