Mechanical properties of double-layer and graded composite coatings of YSZ obtained by atmospheric plasma spraying
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Otros documentos de la autoría: Carpio Cobo, Pablo; Rayón, E.; Salvador Moya, María Dolores; Lusvarghi, Luca; Sánchez-Vilches, Enrique
Metadatos
Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7033
comunitat-uji-handle3:10234/8618
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INVESTIGACIONMetadatos
Título
Mechanical properties of double-layer and graded composite coatings of YSZ obtained by atmospheric plasma sprayingAutoría
Fecha de publicación
2016Editor
Springer VerlagISSN
1059-9630; 1544-1016Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://link.springer.com/article/10.1007/s11666-016-0390-zVersión
info:eu-repo/semantics/acceptedVersionPalabras clave / Materias
Resumen
Double-layer and graded composite coatings of yttria-stabilized zirconia were sprayed on metallic substrates by atmospheric plasma spray. The coating architecture was built up by combining two different feedstocks: ... [+]
Double-layer and graded composite coatings of yttria-stabilized zirconia were sprayed on metallic substrates by atmospheric plasma spray. The coating architecture was built up by combining two different feedstocks: one micro- and one nanostructured. Microstructural features and mechanical properties (hardness and elastic modulus) of the coatings were determined by FE-SEM microscopy and nanoindentation technique, respectively. Additional adherence and scratch tests were carried out in order to assess the failure mechanisms occurring between the layers comprising the composites. Microstructural inspection of the coatings confirms the two-zone microstructure. This bimodal microstructure which is exclusive of the layer obtained from the nanostructured feedstock negatively affects the mechanical properties of the whole composite. Nanoindentation tests suitably reproduce the evolution of mechanical properties through coatings thickness on the basis of the position and/or amount of nanostructured feedstock used in the depositing layer. Adhesion and scratch tests show the negative effect on the coating adhesion of layer obtained from the nanostructured feedstock when this layer is deposited on the bond coat. Thus, the poor integrity of this layer results in lower normal stresses required to delaminate the coating in the adhesion test as well as minor critical load registered by using the scratch test. [-]
Publicado en
Journal of Thermal Spray Technology, April 2016, Volume 25, Issue 4, pp 778-787Derechos de acceso
"The final publication is available at Springer via http://dx.doi.org/10.1007/s11666-016-0390-z"
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info:eu-repo/semantics/openAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
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