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Development of suspension plasma sprayed alumina coatings with high enthalpy plasma torch
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SYSNO ASEP 0476110 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Development of suspension plasma sprayed alumina coatings with high enthalpy plasma torch Author(s) Tesař, Tomáš (UFP-V) ORCID
Mušálek, Radek (UFP-V) RID, ORCID
Medřický, Jan (UFP-V) RID
Kotlan, Jiří (UFP-V)
Lukáč, František (UFP-V) ORCID
Pala, Zdeněk (UFP-V) RID
Ctibor, Pavel (UFP-V) RID, ORCID
Chráska, Tomáš (UFP-V) RID, ORCID
Houdková, Š. (CZ)
Rimal, V. (CZ)
Curry, N. (AT)Source Title Surface and Coatings Technology. - : Elsevier - ISSN 0257-8972
Roč. 325, September (2017), s. 277-288Number of pages 12 s. Publication form Print - P Language eng - English Country CH - Switzerland Keywords Suspension plasma spraying ; Aluminium oxide ; Mechanical properties ; Hardness ; Adhesion ; Wear resistance Subject RIV JK - Corrosion ; Surface Treatment of Materials OECD category Coating and films R&D Projects GA15-12145S GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 UT WOS 000411296900033 EID SCOPUS 85021405780 DOI 10.1016/j.surfcoat.2017.06.039 Annotation Deposition of aluminium oxide (Al2O3) coatings from liquid feedstocks using a high enthalpy hybrid water-stabilized plasma torch was investigated. The entire process included the optimization of spraying parameters using a commercial ready-to-spray suspension, optimization and deposition of custom-made suspensions and one solution and evaluation of mechanical properties of the most durable coatings. Acquired coating microstructures
varied from porous with typical columnar morphology to well-sintered dense structures with low porosity.
The microstructural features were clearly linked to the feedstock formulation. The most durable coating with the highest density microstructure prepared from ethanol-based suspension showed outstanding mechanical properties, e.g. high values of hardness (up to 1211 HV0.3), tensile adhesion strength (up to 51 MPa) and wear resistance (material removal rate as low as 1.94·10-5 mm3·N-1·m-1 as measured by pin-on-disc test). Moreover, deposition froma water-based solution of aluminiumnitrate resulted in deposition of highly porous coating composed predominantly of stable .alpha.-alumina phase.Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2018
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