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Cold Sprayed Tungsten Armor for Tokamak First Wall

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    0521654 - ÚFP 2020 RIV CH eng J - Journal Article
    Čížek, Jan - Vilémová, Monika - Lukáč, František - Koller, M. - Kondás, J. - Singh, R.
    Cold Sprayed Tungsten Armor for Tokamak First Wall.
    Coatings. Roč. 9, č. 12 (2019), č. článku 836. E-ISSN 2079-6412
    R&D Projects: GA ČR(CZ) GA17-23154S; GA ČR(CZ) GA17-13573S
    Institutional support: RVO:61389021
    Keywords : matrix composite coatings * sliding wear behavior * erosion performance * microstructure characterization * deposition behavior * formation mechanism * wc * particles * fabrication * interface * cold gas kinetic spray * W-Cr * W alloys * oxidation shield * nuclear fusion * thick coatings * self-passivation * pfc * plasma facing components
    OECD category: Materials engineering
    Impact factor: 2.436, year: 2019
    Method of publishing: Open access
    https://www.mdpi.com/2079-6412/9/12/836

    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 mu 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 Cr2WOx phases.
    Permanent Link: http://hdl.handle.net/11104/0306243

     
     
Number of the records: 1  

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