The Role of Spraying Parameters and Inert Gas Shrouding in Hybrid Water-Argon Plasma Spraying of Tungsten and Copper for Nuclear Fusion Applications

0392784 - ÚFP 2014 RIV US eng J - Journal Article
Matějíček, Jiří - Kavka, Tetyana - Bertolissi, Gabriele - Ctibor, Pavel - Vilémová, Monika - Mušálek, Radek - Nevrlá, Barbara
The Role of Spraying Parameters and Inert Gas Shrouding in Hybrid Water-Argon Plasma Spraying of Tungsten and Copper for Nuclear Fusion Applications.
Journal of Thermal Spray Technology. Roč. 22, č. 5 (2013), s. 744-755. ISSN 1059-9630. E-ISSN 1544-1016
R&D Projects: GA MPO FR-TI2/702; GA TA ČR TA01010300
Institutional support: RVO:61389021
Keywords : plasma spraying * tungsten * copper * inert gas shrouding * water-argon plasma torch * gas shroud * hybrid plasma torch * influence of spray parameters * nuclear fusion * oxidation
Subject RIV: JG - Metallurgy
Impact factor: 1.491, year: 2013
http://link.springer.com/content/pdf/10.1007%2Fs11666-013-9895-x.pdf

Tungsten-based coatings have potential application in the plasma-facing components in future nuclear fusion reactors. By the combination of refractory tungsten with highly thermal conducting copper, or steel as a construction material, functionally graded coatings can be easily obtained by plasma spraying, and may result in the development of a material with favorable properties. During plasma spraying of these materials in the open atmosphere, oxidation is an important issue, which could have adverse effects on their properties. Among the means to control it is the application of inert gas shrouding, which forms the subject of this study and represents a lower-cost alternative to vacuum or low-pressure plasma spraying, potentially applicable also for spraying of large surfaces or spacious components. It is a continuation of recent studies focused on the effects of various parameters of the hybrid water-argon torch on the in-flight behavior of copper and tungsten powders and
Permanent Link: http://hdl.handle.net/11104/0221567