Institute of Plasma Physics - project detail 00126

Tungsten-Based Coatings for Plasma Facing Components of Fusion Reactors
Project ID:	TW5-TVM-PSW
Provider:	Euratom under European Fusion Development Agreement
Period:	Jan 01, 2005 - Dec 01, 2006
Principal Investigator:	Ing. Jiří Matějíček, PhD.
Co-investigators	K. Neufuss
Aims of the project: For plasma facing components of fusion research devices, special materials are sought for. Since "single" materials (such as steels, special alloys, etc.) are often at the limits of their properties, new types of materials must be developed. These materials have to withstand high thermal fluxes and irradiation by neutral and ionized particles. One of the candidate materials is tungsten, mainly because of its high melting point and high threshold for sputtering. The underlying cooling system has to be able to remove high thermal power; for this, copper with its high thermal conductivity is advantageous. Plasma spraying offers itself as promising technology to produce tungsten plasma facing coatings as well as tungsten-copper composites and graded layers that will enable joining with the cooling system and minimize the interfacial thermal stresses. Specific tasks of this project include: - development and optimization of spraying technique for tungsten, especially regarding deposition efficiency, oxidation and porosity control - optimization of spraying technique for tungsten+copper composites and their composition - deposits characterization by SEM, XRD, and other techniques - sample testing in Tokamak CASTOR and high heat flux facility JUDITH
Results:
Matějíček J., Chráska P., Linke J.: Thermal Spray Coatings for Fusion Applications — Review. Journal of Thermal Spray Technology 16 [1] (2007) 64-83. [ Abstract ] [ DOI ]
Matějíček J., Weinzettl V., Dufková E., Piffl V., Peřina V.: Plasma Sprayed Tungsten-based Coatings and their Usage in Edge Plasma Region of Tokamaks. Acta Technica CSAV 51 [2] (2006) 179-191. [ Abstract ]
Weinzettl V., Piffl V., Matějíček J., Dufková E., Zajac J., Dejarnac R., Peřina V.: THE EFFECT OF THE USE OF DIFFERENT ELECTRODE MATERIALS FOR EDGE-PLASMA BIASING ON PLASMA DENSITY AND FLOATING POTENTIAL MODIFICATIONS. Czechoslovak Journal of Physics 55 [12] (2005) 1607-1614. [ Abstract ] [Electric Fields, Structures and Relaxation in Edge Plasmas,. Tarragona, 3.7.2005-4.7.2005]
Matějíček J., Chumak O., Konrád M., Oberste-Berghaus J., Lamontagne M.: The Influence of Spraying Parameters on In-Flight Characteristics of Tungsten Particles and the Resulting Splats Sprayed by Hybrid Water-Gas Stabilized Plasma Torch. Thermal Spray connects: Explore its surfacing potential!. Düsseldorf : DVS-Verlag, 2005 - (Lugscheider, E.) s. 594-599. [ Abstract ] [International Thermal Spray Conference. Basel (CH), 2.5.2005-4.5.2005]
Weinzettl V., Piffl V., Matějíček J., Dufková E., Zajac J., Peřina V.: BIASING EXPERIMENTS WITH SOLID AND POROUS ELECTRODES. Europhysics Conference Abstracts ECA. Tarragona : EPS, 2005 - (van Milligen, B.; Hidalgo, C.) P-4.006. ISBN 2-914771-24-X. - (29C). [ Abstract ] [ Link ] [EPS Plasma Physics Conference /32nd./. Tarragona (ES), 27.06.2005-01.07.2005]
Matějíček J., Koza Y., Weinzettl V.: Plasma sprayed tungsten-based coatings and their performance under fusion relevant conditions. Fusion Engineering and Design 75-79 (2005) 395-399. [ Abstract ] [ DOI ] [Symposium of Fusion Technology/23rd./. Venice, 20.9.2004-24.9.2004]
Matějíček J., Neufuss K., Kolman D., Chumak O., Brožek V.: Development and Properties of Tungsten-Based Coatings Sprayed by WSP(R). Thermal Spray connects: Explore its surfacing potential!. Düsseldorf : DVS-Verlag, 2005 - (Lugscheider, E.) s. 634-640. [ Abstract ] [International Thermal Spray Conference. Basel (CH), 2.5.2005-4.5.2005]
Pintsuk G., Döring J.-E., Hohenauer W., Linke J., Matějíček J., Smid I., Tietz F.: Microstructural and mechanical properties of plasma sprayed W/Cu-graded composites for extreme thermal conditions. Proceedings 2003 World Congress on Powder Metallurgy & Particulate Materials. Princeton, NJ, US, 2003. s. 6.107-6.118. [ Abstract ] [World Congress on Powder Metallurgy & Particulate Materials /2003./. Las Vegas, Nevada (US), 08.06.2003-12.06.2003]