Zr alloy protection against high-temperature oxidation: coating by a double-layered structure with active and passive functional properties

0540178 - FZÚ 2021 RIV GB eng J - Journal Article
Kratochvílová, Irena - Ashcheulov, Petr - Škarohlíd, J. - Škoda, R. - Kopeček, Jaromír - Sajdl, P. - Macák, J. - Lajčinová, M. - Nováková, A. - Neethling, J. - van Vuuren, A. J. - Ngongo, S. - Xu, P. - Lorinčík, J. - Steinbrück, M.
Zr alloy protection against high-temperature oxidation: coating by a double-layered structure with active and passive functional properties.
Corrosion Science. Roč. 163, Feb (2020), s. 1-11, č. článku 108270. ISSN 0010-938X. E-ISSN 1879-0496
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA TA ČR TK02030069; GA MŠMT EF16_013/0001406; GA MŠMT(CZ) LO1409; GA MŠMT(CZ) LM2015088
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760; OP VVV - SAFMAT(XE) CZ.02.1.01/0.0/0.0/16_013/0001406
Institutional support: RVO:68378271
Keywords : high temperature corrosion * Zr nuclear tubes * double layer protective coating * nanocrystalline diamond coating * CrAlSiN
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 7.205, year: 2020
Method of publishing: Limited access
https://doi.org/10.1016/j.corsci.2019.108270

In this work, a new concept of metal surface protection against degradation caused by high-temperature oxidation in water environment is presented. We were the first to create a double-layered coating consisting of an active and passive part to protect Zr alloy surface against high-temperature oxidation in a hot water environment. We investigated the hot steam corrosion of ZIRLO fuel cladding coated with a double layer consisting of 500 nm nanocrystalline diamond (NCD) as the bottom layer and 2 μm chromium-aluminum-silicon nitride (CrAlSiN) as the upper layer. Coated and uncoated ZIRLO samples were exposed for 4 days at 400 °C in an autoclave and for 60 min at 1000 °C (nuclear reactor accident temperature) in a hot steam furnace. We have shown that the NCD coating protects the Zr alloy surface against oxidation in an active way: carbon from NCD layer enters the Zr alloy surface and, by changing the physical and chemical properties of the Zr cladding tube surface.
Permanent Link: http://hdl.handle.net/11104/0317942