Physical properties of plasma sprayed refractory materials
Project ID:GA106/08/1240
Provider:Czech Science Foundation
Period:Jan 01, 2008 - Dec 31, 2010
Recipient -- coordinator:Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, Prague -- Ing. Ondřej Kovářík, Ph.D.
Co-recepient(s) / PI(s):Institute of Plasma Physics, Czech Academy of Sciences, Prague -- Ing. Jiří Dubský, CSc.
Co-investigators from IPPT. Chráska, P. Chráska, B. Kolman, P. Rohan

Aims of the project: The increasing demands on heat and corrosion resistance of engineering materials lead to extended use of refractory materials. At present time attempts are made to replace powder metallurgy used for fabrication of parts of refractory materials with alternative technologies such as thermal spray. It is possible to obtain high density deposits of refractories by thermal spraying, however the formation of residual stress and grain growth still needs attention. Previous experiments and available literature suggest that changing the substrate temperature and torch scanning speed may be an efficient way to control microstructure and stress in the deposit. In order to understand the mechanism of coating formation it is necessary to characterize theevents taking place during the deposition, such as grain growth, oxidation, sintering and stress relaxation speeds and temperatures. Other means of coating characterization will be performed as well to establish a link between technological parameters


Dubský J., Chráska P., Kolman B., Stahr C.Ch., Berger L.-M.: Phase Formation Control in Plasma Sprayed Alumina–Chromia Coatings. Ceramics - Silikáty 55 [3] (2011) 294-300. [ Link ]

Mušálek R., Matějíček J., Vilémová M., Kovářík O.: Non-Linear Mechanical Behavior of Plasma Sprayed Alumina Under Mechanical and Thermal Loading. Journal of Thermal Spray Technology 19 [1-2] (2010) 422-428. [ Abstract ] [ Link ]
[International Thermal Spray Conference (ITSC 2009):Expanding Thermal Spray Performance to New Markets and Applications. Las Vegas, NV, 04.05.2009-07.05.2009]

Chráska P., Chráska T.: Thermally Sprayed Functionally Graded Materials(DOI: 10.1002/9781118144442.ch10). Processing and Properties of Advanced Ceramics and Composites. Hoboken, NJ : American Ceramic Society, 2011 - (Bansal, N.; Singh, J.; Lamon, J.; Choi, S.) S. 109-122. ISBN 978-1-1180-5998-2. - (Ceramic Transactions. 3. 225). [ Link ]
[Materials Science & Technology (MS&T’10). Houston, TX (US), 17.10.2010-21.10.2010]

Voleník K., Schneeweiss O., Chráska T., Kolman B., Chráska P.: Composition changes of cast iron particles due to reactions in a plasma stream. World PM2010 Proceedings: Powder Manufacturing and Processing; Miniaturization and Nanotechnology; Powder Pressing. Shrewsbury : European Powder Metallurgy Association, 2010. S. 143-150. ISBN 978-1899072101. [ Abstract ]
[Powder Metallurgy World Congress & Exhibition – PM2010. Florencie (IT), 10.10.2010-14.10.2010]