Next Article in Journal
Artificial Patination of Copper and Copper Alloys in Wet Atmosphere with Increased Content of SO2
Next Article in Special Issue
Cold Gas Spraying of a High-Entropy CrFeNiMn Equiatomic Alloy
Previous Article in Journal
Electrochemical Behavior, Microstructure, and Surface Chemistry of Thermal-Sprayed Stainless-Steel Coatings
Previous Article in Special Issue
Effect of Powder Mixture Composition on the Deposition Efficiency in Cold Spay: Modelling and Experimental Validation
Open AccessArticle

Cold Sprayed Tungsten Armor for Tokamak First Wall

1
Institute of Plasma Physics, The Czech Academy of Sciences, 182 00 Prague, Czech Republic
2
Institute of Materials Science and Engineering, Brno University of Technology, 616 69 Brno, Czech Republic
3
Institute of Thermomechanics, The Czech Academy of Sciences, 182 00 Prague, Czech Republic
4
Impact Innovations GmbH, 84431 Rattenkirchen, Germany
5
Department of Mechanical Engineering, Politecnico di Milano, 20156 Milan, Italy
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(12), 836; https://doi.org/10.3390/coatings9120836
Received: 9 September 2019 / Revised: 28 November 2019 / Accepted: 2 December 2019 / Published: 7 December 2019
(This article belongs to the Special Issue Cold Spraying: Recent Trends and Future Views)
Harnessing nuclear fusion is a challenging task, in particular because of the demands put on the used materials. In tokamaks, future energy sources, the inner-most chambers are to be coated with dense coatings of W, or W-Cr-based alloys. So far, the attempts for such coatings formation by other methods failed due to oxidation, high porosity, insufficient adhesion, high specific surface, or even insufficient thickness below 10 μ m. Cold spraying seems a promising technology for the task. In our study, we demonstrate the first successful fabrication of thick pure W coatings. W-Cr and W-Cr-Ti coatings were further prepared without oxidation of the metals. All coatings exhibited high hardness levels, good interface quality with three tested substrates and, importantly, a promising potential for formation of stable Cr 2 WO x phases. View Full-Text
Keywords: cold gas kinetic spray; W-Cr; W alloys; oxidation shield; nuclear fusion; thick coatings; self-passivation; PFC; plasma facing components cold gas kinetic spray; W-Cr; W alloys; oxidation shield; nuclear fusion; thick coatings; self-passivation; PFC; plasma facing components
Show Figures

Figure 1

MDPI and ACS Style

Cizek, J.; Vilemova, M.; Lukac, F.; Koller, M.; Kondas, J.; Singh, R. Cold Sprayed Tungsten Armor for Tokamak First Wall. Coatings 2019, 9, 836.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop