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dc.contributor.authorCarpio Cobo, Pablo
dc.contributor.authorSalvador Moya, María Dolores
dc.contributor.authorBorrell, A.
dc.contributor.authorSánchez Vilches, Enrique Javier
dc.date.accessioned2017-06-16T09:29:16Z
dc.date.available2017-06-16T09:29:16Z
dc.date.issued2017
dc.identifier.citationCARPIO, P., et al. Thermal behaviour of multilayer and functionally-graded YSZ/Gd 2 Zr 2 O 7 coatings. Ceramics International, 2017, vol. 43, no 5, p. 4048-4054. MLAca_CA
dc.identifier.issn0272-8842
dc.identifier.issn1873-3956
dc.identifier.urihttp://hdl.handle.net/10234/168021
dc.description.abstractZirconates with pyrochlore structure, such as Gd2Zr2O7, are new promising thermal barrier coatings because of their very low thermal conductivity and good chemical resistance against molten salts. However, their coefficient of thermal expansion is low, therefore their thermal fatigue resistance is compromised. As a solution, the combination of yttria-stabilised zirconia (YSZ) and Gd2Zr2O7 can reduce the thermal contraction mismatch between the thermal barrier coating parts. In the present study, two possible designs have been performed to combine YSZ/Gd2Zr2O7. On the one hand, a multilayer coating was obtained where YSZ layer was deposited between a Gd2Zr2O7 layer and a bond coat. On the other hand, a functionally-graded coating was designed where different layers with variable ratios of YSZ/Gd2Zr2O7 were deposited such that the composition gradually changed along the coating thickness. Multilayer and functionally-graded coatings underwent isothermal and thermally-cycled treatments in order to evaluate the oxidation, sintering effects and thermal fatigue resistance of the coatings. The YSZ/Gd2Zr2O7 multilayer coating displayed better thermal behaviour than the Gd2Zr2O7 monolayer coating but quite less thermal fatigue resistance compared to the conventional YSZ coating. However, the functionally-graded coating displays a good thermal fatigue resistance. Hence, it can be concluded that this kind of design is ideal to optimise the behaviour of thermal barrier coatings.ca_CA
dc.description.sponsorShipThis work has been supported by the Spanish Ministry of Economy and Competitiveness (project MAT2015-67586-C3-R). A. Borrell acknowledges the Spanish Ministry of Economy and Competitiveness for her Juan de la Cierva-Incorporación contract (IJCI-2014-49839) and the Program to Support Research and Development (PAID-00-15) of the Universitat Politècnica de València. P. Carpio acknowledges the Valencia Government for his post-doc contract (APOSTD/2016/040).ca_CA
dc.format.extent7 p.ca_CA
dc.format.mimetypeapplication/pdfca_CA
dc.language.isoengca_CA
dc.publisherElsevierca_CA
dc.relation.isPartOfCeramics International, 2017, vol. 43, no 5ca_CA
dc.rightsCopyright © Elsevier B.V.ca_CA
dc.subjectthermal applicationsca_CA
dc.subjectthermal propertiesca_CA
dc.subjectZrO2 and earth-rare zirconatesca_CA
dc.subjectMultilayers and functionally-graded coatingsca_CA
dc.titleThermal behaviour of multilayer and functionally-graded YSZ/Gd2Zr2O7 coatingsca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttps://doi.org/10.1016/j.ceramint.2016.11.178
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_CA
dc.relation.publisherVersionhttp://www.sciencedirect.com/science/article/pii/S0272884216321927ca_CA


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