Thermal spray processing and high temperature structural stability of nanocrystalline thermal barrier coatings
Project ID:GAP107/12/1922
Provider:Czech Science Foundation
Period:Jan 01, 2012 - Dec 31, 2014
Principal Investigator:Ing. Jiří Dubský, CSc.
Co-investigatorsT. Chráska, B. Nevrlá

Aims of the project: The proposed project is focused on plasma spraying deposition, structural stability and mechanical properties of novel amorphous and nanocrystalline ZrO2-Al2O3-SiO2 eutectic ceramic and composite ZrO2-Y2O3 + ZrO2-Al2O3-SiO2 coating systems designed for high temperature applications. Parameteres of plasma deposition of these coatings on CoNiCrAlY bond coat and Inconel 713LC nickel-based substrate and parameters of subsequent heat treatment will be chosen to facilitate formation of amorphous or nanocrystalline structures within the splats of plasma sprayed ceramic coatings. Based on the experimental work (thermal exposure, high temperature isothermal low cycle fatigue, biaxial bending-torsion fatigue) and on results of analytical methods (optical and electron microscopy, microstructure and phase analysis, topographical measurements and microhardness), structural stability and mechanical properties of these novel coating systems will be assessed and compared with characteristics of conventional plasma sprayed ZrO2-Y2O3 coatings.


Chráska T., Pala Z., Mušálek R., Medřický J., Vilémová M.: Post-treatment of Plasma-Sprayed Amorphous Ceramic Coatings by Spark Plasma Sintering. Journal of Thermal Spray Technology 24 [4] (2015) 637-643. [ Abstract ] [ Link ]

Chráska T., Medřický J., Mušálek R., Vilémová M., Pala Z., Cinert J.: Post-treatment of plasma sprayed amorphous ceramic coatings by spark plasma sintering. ITSC 2014 :Interational Thermal Spray Conference and Exposition, Abstracts (including manuscripts on CD-ROM). Düsseldorf : DVS Media GmbH, 2014, s. 617-622. ISBN 978-3-87155-574-9. - (DVS-Berichte. 302). [ Abstract ] [ Link ]
[ITSC 2014 :Interational Thermal Spray Conference and Exposition. Barcelona (ES), 21.05.2014-23.05.2014]

Dubský J., Chráska T., Pala Z., Nevrlá B., Chráska P.: Plasma Spraying of Silica-Rich Calcined Clay Shale. Journal of Thermal Spray Technology 23 [4] (2014) 732-741. [ Abstract ] [ Link ]