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CrN–NbN nanolayered...
CrN–NbN nanolayered coatings for enhanced accident tolerant fuels in BWR
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- Fazi, Andrea, 1992 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Sattari, Mohammad, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Strach, Michal, 1988 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Boll, Torben, 1979 (author)
- Karlsruher Institut für Technologie (KIT),Karlsruhe Institute of Technology (KIT)
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- Stiller, Marta Krystyna, 1947 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Andrén, Hans-Olof, 1947 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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Adorno Lopes, Denise (author)
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- Thuvander, Mattias, 1968 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Journal of Nuclear Materials. - 0022-3115. ; 586
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https://doi.org/10.1...
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Abstract
Subject headings
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- The accident tolerant fuel (ATF) concept has emerged in the years after the 2011 Fukushima accident as part of a renewed effort in research for light water reactors. The primary focus is to further improve safety measures under and beyond design basis accident conditions, and to improve fuel cladding performance in normal operation. The application of a coating on zirconium claddings can achieve both these aims without extensive changes to the reactor design. Metallic chromium coatings have been profusely studied as solution for pressurized water reactors, but the search for an effective ATF coating able to withstand the environment inside boiling water reactors (BWRs) is still ongoing. In this work, two different versions of a novel nitride coating composition were studied. Zirconium claddings coated with 8 µm thick layers of superlattice CrN–NbN and a nanolayered CrN–NbN were tested in autoclave under BWR operating conditions for 60 days. Scanning electron microscopy, transmission electron microscopy, energy dispersive x-ray spectroscopy, electron back-scattered diffraction, x-ray diffraction, and atom probe tomography were employed to characterize as-deposited and autoclaved samples of these two materials. During exposure, both coating versions formed a stable, dense and passivating oxide scale (200–300 nm thick) on the surface, demonstrating improved oxidation protection under operating conditions. Some differences in the oxide growth mechanism were observed between the superlattice and the nanolayered CrN–NbN coatings, which allowed to glimpse at the effect of the layer thickness on the oxidation protection provided by these coatings. The nano-structured morphology of both coatings remained unaffected by the autoclave test, but a 35 nm thick Zr-Cr-N phase was found at the coating-substrate interface of the superlattice CrN–NbN coated cladding.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Korrosionsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Corrosion Engineering (hsv//eng)
Keyword
- Accident tolerant fuels
- Nitride coating
- CrNNbN
- Atom probe tomography
- Superlattice
- PVD
Publication and Content Type
- art (subject category)
- ref (subject category)
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Fazi, Andrea, 19 ...
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Sattari, Mohamma ...
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Strach, Michal, ...
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Boll, Torben, 19 ...
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Stiller, Marta K ...
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Andrén, Hans-Olo ...
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Adorno Lopes, De ...
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Thuvander, Matti ...
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- About the subject
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Mechanical Engin ...
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and Energy Engineeri ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Materials Engine ...
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and Manufacturing Su ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Chemical Enginee ...
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and Corrosion Engine ...
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Journal of Nucle ...
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Chalmers University of Technology