Influence of solids concentration on the microstructure of suspension plasma sprayed Y-TZP/Al2O3/SiC composite coatings
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Other documents of the author: Carnicer Cervera, Víctor; Orts Tarí, María José; Moreno, Rodrigo; Sánchez-Vilches, Enrique
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comunitat-uji-handle2:10234/7033
comunitat-uji-handle3:10234/8618
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INVESTIGACIONMetadata
Title
Influence of solids concentration on the microstructure of suspension plasma sprayed Y-TZP/Al2O3/SiC composite coatingsAuthor (s)
Date
2019Publisher
ElsevierISSN
0257-8972; 1879-3347Bibliographic citation
Carnicer, V., et al. "Influence of solids concentration on the microstructure of suspension plasma sprayed Y-TZP/Al2O3/SiC composite coatings." Surface and Coatings Technology, 2019Type
info:eu-repo/semantics/articlePublisher version
https://www.sciencedirect.com/science/article/pii/S0257897219300957Version
info:eu-repo/semantics/submittedVersionSubject
Abstract
The present research focuses on the effect of feedstock suspension solid concentration on the microstructure of suspension plasma sprayed Y-TZP/Al2O3/SiC composite coatings. For this purpose, concentrated aqueous ... [+]
The present research focuses on the effect of feedstock suspension solid concentration on the microstructure of suspension plasma sprayed Y-TZP/Al2O3/SiC composite coatings. For this purpose, concentrated aqueous suspensions were prepared at 10, 20 and 30 vol.% of particles. Suspensions were characterised in terms of colloidal stability, rheological behaviour and sedimentation trend. The optimised suspensions were plasma sprayed, and the thickness, porosity, amount of resolidified particles and SiC content in the coatings were evaluated by optical microscopy, scanning electron microscopy and X-ray diffraction.
The results revealed that stand-off distance and suspension solid content have a strong and similar influence on the coating microstructure due to the great impact that these two parameters exerts on the energy that particles and substrate receive during plasma operation. Thus, cauliflower-like microstructure is well-developed in most of the coatings, particularly for longer distances and lower solid contents. Porosity and amount of resolidified particles in the coatings are favoured by increasing the stand-off distance and decreasing the solids content, while thickness is strongly affected by solids content variation. On the other hand, Rietveld method from X-ray diffraction showed that large amount of the initial SiC was preserved in the final coatings whereas this amount remains almost constant for the three suspension feedstock tested. [-]
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Surface and Coatings Technology, 2019Investigation project
The authors of this work are grateful to support of Spanish Ministry of Economy, Industry and Competitiveness and FEDER Funds under the Grant no MAT2015-67586-C3-R, and the Research Promotion Plan of the Universitat Jaume I for the predoctoral fellowship (re. PREDOC/2017/51)Rights
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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