Institute of Plasma Physics - project detail 00047

Composition changes of ceramic and metallic materials during their plasma spraying
Project ID:	GA106/03/0710
Provider:	Czech Science Foundation
Period:	Jan 01, 2003 - Dec 31, 2005
Recipient - coordinator	Institute of Plasma Physics, Czech Academy of Sciences, Prague
Principal Investigator:	Ing. Jan Písačka, Ph.D.
Co-recepient(s) / PI(s):	Faculty of Mechanical Engineering, CTU in Prague -- Ing. David Kolman, Ph.D. Faculty of Chemical Technology, ICT Prague -- Doc. Ing. Jindřich Leitner, DrSc.
Co-investigators from IPP	J. Dubský, B. Kolman, K. Neufuss, P. Rohan, K. Voleník, T. Chráska, J. Nohava, J. Matějíček, P. Svobodová
Aims of the project: Despite the wide use of plasma spraying of metals and ceramics, the knowledge of the composition changes occurring during this process is not satisfactory. The elemental and phase compositions of plasma deposits often differ significantly from that offeedstock powders. In many cases, this may influence negatively the deposit properties. The aim of the submitted project is to investigate thoroughly the phenomena affecting the composition changes. In particular, selective evaporation of the moltenparticles flying in the plasma plume, surface reactions with the surrounding gaseous phase, convective motion of the melt within the particles, and solid-state phase transformations will be investigated. Two distinct stages of the spraying process willbe studied. At the in-flight stage the composition changes occur in the melt, whereas at the second stage, i.e. after the particle impact and solidification, the changes take place in the solid state. The aim of the project is not only to determine
Progress/Results: Influence of water stabilized plasma on composition of selected metallic and ceramic materials thermally sprayed by Water Stabilized Plasma Gun was studied. Both selective evaporation and oxidation of the reactive components as the origins of composition
Results:
Leitner J., Voleník K., Neufuss K., Kolman B.: Vaporization of componets from alloy powder particles in a plasma flow. Czechoslovak Journal of Physics 56 [suppl.B] (2006) B1391-B1400. [ Abstract ] [Symposium on Plasma Physics and Technology/22nd./. Praha, 26.6.2006-29.6.2006]
Voleník K., Nop P., Kopřiva P., Kolman B., Dubský J.: Isothermal oxidation of metallic coatings deposited by a water-stabilized plasma gun. Kovové materiály 44 [1] (2006) 41-48. [ Abstract ]
Písačka J., Neufuss K., Dubský J., Nohava J., Kolman B.: Plasma spraying behaviour and properties of synthesized/agglomeratedcalcium/magnesium zirconates versus lime/magnesia stabilized zirconia. Proceedings of International Thermal Spray Conference 2005. Düsseldorf : DSV-Verlag, Dusseldorf, 2005 - (Lugscheider, E.) s. 569-574. ISBN 3-87155-793-5. [ Abstract ] [International Thermal Spray Conference 2005. Basilej (CH), 02.05.2005-04.05.2005]
Chráska P., Kolman B., Suchánek M., Voleník K.: Composition changes of selected alloys during their plasma spraying. International Thermal Spray Conference & Exposition, ITSC 2004. Düsseldorf : DVSVerlag GmbH, 2004. s. 10-14. ISBN 3-87155-792-7. - (ASM International-Thermal Spray Society). [ Abstract ] [International Thermal Spray Conference, ITSC 2004.. Osaka (JP), 10.05.2004-12.05.2004]
Rohan P., Neufuss K., Matějíček J., Dubský J., Prchlík L., Holzgartner C.: Thermal and mechanical properties of cordierite, mullite and steatite produced by plasma spraying. Ceramics International 30 [4] (2004) 597-603. [ Abstract ] [ Link ]