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Comparing the deposition mechanisms in suspension plasma spray (SPS) and solution precursor plasma spray (SPPS) deposition of yttria-stabilised zirconia (YSZ)

Abstract : Thermal spraying using liquid feedstock has emerged as a promising technology for the deposition of finely structured ceramic coatings. In order to provide a comparative assessment of the deposition mechanisms occurring when spraying suspension or solution feedstock, suspensions of 300 nm-sized ZrO2-4.5 mol.% Y2O3 particles dispersed in water and in ethanol and solutions of zirconium and yttrium salts, corresponding to ZrO2-4.5 mol.% Y2O3 and ZrO2-8 mol.% Y2O3 stoichiometries, were processed by plasma spraying using different parameter settings. In-flight diagnostics of sprayed droplets, together with the morphological, microstructural and phase analysis of individual lamellae collected onto polished substrates, performed by SEM, FIB, AFM and micro-Raman spectroscopy, led to the identification of deposition mechanisms, which were subsequently verified through the characterisation of complete coating layers.
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https://hal.archives-ouvertes.fr/hal-01016476
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Submitted on : Friday, July 11, 2014 - 3:41:43 PM
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Aurélien Joulia, Giovanni Bolelli, Enrico Gualtieri, Luca Lusvarghi, Sergio Valeri, et al.. Comparing the deposition mechanisms in suspension plasma spray (SPS) and solution precursor plasma spray (SPPS) deposition of yttria-stabilised zirconia (YSZ). Journal of the European Ceramic Society, Elsevier, 2014, 11 p. ⟨10.1016/j.jeurceramsoc.2014.05.024⟩. ⟨hal-01016476⟩

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