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Feasibility of suspension spraying of yttria-stabilized zirconia with water-stabilized plasma torch
Institute of Plasma Physics AS CR, v.v.i., Department of Materials Engineering, Za Slovankou 3, 182 00 Prague, Czech Republic.
Institute of Plasma Physics AS CR, v.v.i., Department of Materials Engineering, Za Slovankou 3, 182 00 Prague, Czech Republic.
Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, .
Institute of Plasma Physics AS CR, v.v.i., Department of Materials Engineering, Za Slovankou 3, 182 00 Prague, Czech Republic.
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2015 (English)In: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 268, no April, 58-62 p.Article in journal (Refereed) Published
Abstract [en]

Thermal spraying of suspensions allows preparation of coatings from submicron-sized powders but demands a source of heat with a high enthalpy in order to provide an appropriate thermal treatment of the liquid feedstock during the in-flight stage so that the solvent may be evaporated, dispersed particles melted and accelerated towards the substrate to form a coating. Water-stabilized plasma (WSP) torch developed at the Institute of Plasma Physics AS CR, v.v.i. provides such a heat source with high enthalpy, high velocity of the plasma and, when compared to high-enthalpy gas-stabilized plasma (GSP) torches, relatively cheap operation. In this study, results of our experiments with suspension spraying of yttria-stabilized zirconia (YSZ) with WSP torch are presented and demonstrate that coating deposition with a high feed rate is possible with WSP technology. Formation of both columnar “cauliflower” microstructure and segmentation cracks was achieved. Variation of the deposition conditions was observed to modify coating microstructure in terms of splat morphology, porosity and thickness per pass, which is promising for further coating development.

Place, publisher, year, edition, pages
2015. Vol. 268, no April, 58-62 p.
Keyword [en]
Thermal spray coating, Suspension spraying, Thermal barrier coating, Water-stabilized plasma, High enthalpy plasma
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-6517DOI: 10.1016/j.surfcoat.2014.07.069ISI: 000353735300010Scopus ID: 2-s2.0-84926260446OAI: oai:DiVA.org:hv-6517DiVA: diva2:746304
Conference
6th Rencontres Internationales de la Projection Thermique
Note

Available online 2 August 2014

Available from: 2014-09-12 Created: 2014-08-20 Last updated: 2017-12-05Bibliographically approved

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