2011
DOI: 10.1016/j.jeurceramsoc.2011.05.014
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Preliminary study on suspension plasma sprayed ZrO2+8wt.% Y2O3 coatings

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Cited by 49 publications
(26 citation statements)
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“…Figure 2 shows the cross-sectional SEM images of the as-sprayed coatings obtained from Yn, Ys and Ysn feedstocks at the three spraying distances tested (in the case of the Yn sample the longest spraying distance was not realised). As reported elsewhere all the micrographs reveal two-zones microstructure, named as (I) molten melted and (II) sintered grains areas [11,15], which are displayed on the micrographs. For the sake of distinguishing porosity is also marked P in the micrographs.…”
Section: Resultssupporting
confidence: 69%
See 1 more Smart Citation
“…Figure 2 shows the cross-sectional SEM images of the as-sprayed coatings obtained from Yn, Ys and Ysn feedstocks at the three spraying distances tested (in the case of the Yn sample the longest spraying distance was not realised). As reported elsewhere all the micrographs reveal two-zones microstructure, named as (I) molten melted and (II) sintered grains areas [11,15], which are displayed on the micrographs. For the sake of distinguishing porosity is also marked P in the micrographs.…”
Section: Resultssupporting
confidence: 69%
“…As a consequence the final microstructure largely depends on the characteristics of the suspension feedstock and plasma spraying conditions. As set out in the literature the heat flux significantly increases as the standoff distance diminishes giving rise to an enhanced cohesion and density in the coating [14][15][16]. As observed in figure 2, areas named II are clearly visible in all the coatings meanwhile the amount of these areas for a given feedstock seems to increase with the spraying distance.…”
Section: Resultsmentioning
confidence: 54%
“…Sin embargo, la cantidad de artículos que tratan el estudio de la técnica de nanoindentación para caracterizar capas de SPS es muy escasa [3][4][5][6]8]. De los más importantes, Wang et al [13] y Pawłowski et al [14] han investigado la estructura y las propiedades mecánicas por indentación de un recubrimiento de YSZ obtenido por SPS a partir de un polvo nanoestructurado. En ambos estudios los recubrimientos mostraron una estructura bimodal formada por partículas nanométricas rodeadas por lamelas completamente fundidas, lo que causó una distribución bimodal de las propiedades (dureza y módulo de elasticidad).…”
Section: Introductionunclassified
“…As torch power is increased, denser coatings with improved inter-splat adhesion are produced, and there is also higher heat flux from the plasma to the coating and substrate during deposition. Such factors have previously been shown to promote the formation of segmentation cracks in SPS coatings [36,41,43]. These segmentation cracks provide stress relief in the coatings, resulting in residual stresses levels in the electrolytes that are smaller than the tensile fracture strength of w200 MPa or bending fracture strength of w350 MPa of free standing 8 mol% YSZ [44].…”
Section: Influence Of Torch Power and Stand-off Distance On Residual mentioning
confidence: 99%