Vacuum-arc chromium-based coatings for protection of zirconium alloys from the high-temperature oxidation in air

Куприн, А.С.; Белоус, В.А.; Voyevodin, V.N.; Брык, В.В.; Василенко, Р.Л.; Овчаренко, В.Д.; Reshetnyak, E.N.; Tolmachova, G.N.; V’yugov, P.N.

doi:10.1016/j.jnucmat.2015.06.016

Cited by 131 publications

(30 citation statements)

References 22 publications

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“…It also appears that Al and Zr oxidize more preferentially than Cr in the coating layer. Unlike Al oxides, Zr oxides are not protective against oxidation toward the matrix at high temperatures [1,2]. Therefore, a mixing between CrAl coating layer and Zr substrate should be carefully controlled to minimize the Zr content at the top of the surface coating layer.…”

Section: Cral Laser-coated Zr Alloy That Exposed To a High Temperaturementioning

confidence: 99%

“…However, Zr alloys are vulnerable to the high temperature oxidation that can occur in the case of accidents. Since explosive hydrogen is formed by the rapid zirconium oxidation, a reduced oxidation rate of Zr alloys at high temperatures is necessary to improve the accident tolerance [1][2][3][4]. As a short-term solution to the problem, protective coating through an efficient and economical method such as laser coating and thermal spray can be considered [2,4].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Oxidation Behavior of CrAl Laser-Coated Zircaloy-4 Alloy

Kim

et al. 2017

Metals

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Laser coating of a CrAl layer on Zircaloy-4 alloy was carried out for the surface protection of the Zr substrate at high temperatures, and its microstructural and thermal stability were investigated. Significant mixing of CrAl coating metal with the Zr substrate occurred during the laser surface treatment, and a rapidly solidified microstructure was obtained. A considerable degree of diffusion of solute atoms and some intermetallic compounds were observed to occur when the coated specimen was heated at a high temperature. Oxidation appears to proceed more preferentially at Zr-rich region than Cr-rich region, and the incorporation of Zr into the CrAl coating layer deteriorates the oxidation resistance because of the formation of thermally unstable Zr oxides.

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Section: Cral Laser-coated Zr Alloy That Exposed To a High Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure and Oxidation Behavior of CrAl Laser-Coated Zircaloy-4 Alloy

Kim

et al. 2017

Metals

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“…Chromium coating as a surface protection of zirconium alloys Krausová Další možností jsou povlaky na bázi chromu či nitridu chromu [8][9][10][11][12]. Dauk a kol.…”

Section: Chromová Vrstva Jako Povrchová Ochrana Zirkoniových Slitinunclassified

“…Se slitinou Zr1Nb dosáhli velmi dobrých výsledků Kuprin a kol. [10], když deponovali na zirkonium multi-vrstvu Zr-Cr/Cr/Cr-N. Tu pak podrobili testům při 1100 °C. Ukázalo se, že zatímco slitina bez povlaku byla po hodinové expozici porézní, odlupovala se a obsahovala velké množství trhlin, Cr povlak se na slitině Zr1Nb oxidoval jen mírně, za vzniku CrO a Cr 2 O 3 a chránil slitinu proti další oxidaci.…”

Section: Chromová Vrstva Jako Povrchová Ochrana Zirkoniových Slitinunclassified

Chromium Coating as a Surface Protection of Zirconium Alloys

Krausová

Tůma

Novák

et al. 2017

Koroze a Ochrana Materialu

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Increasing of nuclear safety, higher demands for longer nuclear fuel campaign and higher levels of burnout are based on improving the properties of zirconium alloys. Protective coatings appears to be a promising way to reduce their chemical reactivity and increase resistance to hydriding. In this work, a thin chromium coating applied to a standard Zr1Nb zirconium alloy was studied using in-situ impedance spectroscopy. Exposure was carried out at a temperature of 280 ° C and a pressure of 8 MPa in a simulated WWER primary coolant environment. The results show that the chromium-coated Zr1Nb alloy is under these conditions oxidized significantly slower than the non-coated alloy.

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“…Coating technology is an effective way to protect the Zircaloy from rapid reaction with steam. Various surface techniques have been applied to deposit coatings on Zircaloy substrates, including physical vapor deposition (PVD) (like arc ion plating, catholic arc evaporation, magnetron sputtering), chemical vapor deposition (CVD), laser cladding, and thermal spray . Considering that the size of the cladding tube is very large (about several meters long), preparation methods containing a high vacuum condition will be restricted by the size of the vacuum chamber.…”

Section: Introductionmentioning

confidence: 99%

Steam oxidation resistance of plasma sprayed chromium‐containing coatings at 1200 °C

Zhao

Niu

Xue

et al. 2018

Materials & Corrosion

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In order to improve the high‐temperature steam oxidation resistance of Zircaloy fuel claddings, chromium‐containing coatings (Cr3C2‐NiCr and NiCr) were deposited on a Zr‐4 substrate by air plasma spray. The steam oxidation resistance of the two coatings was evaluated at 1200 °C under atmospheric pressure. The weight changes, phase compositions, and microstructures of the coatings before and after the oxidation test of 1 h were characterized. Results revealed that the Cr3C2‐NiCr coating effectively protected Zr‐4 from oxidation. A protective Cr2O3 scale with a thickness of about 7 µm was formed on the surface of the Cr3C2‐NiCr coating after 1 h duration and the formed oxide layer was about 100 times thinner than that formed on the uncoated sample. A none protective oxide scale was formed on the surface of the NiCr coated Zr‐4 samples. Severe inter‐diffusion between the NiCr coating and the Zr‐4 substrate was observed. The oxidation mechanisms of the two types of chromium‐containing coatings were analyzed and compared in detail.

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Vacuum-arc chromium-based coatings for protection of zirconium alloys from the high-temperature oxidation in air

Cited by 131 publications

References 22 publications

Microstructure and Oxidation Behavior of CrAl Laser-Coated Zircaloy-4 Alloy

Microstructure and Oxidation Behavior of CrAl Laser-Coated Zircaloy-4 Alloy

Chromium Coating as a Surface Protection of Zirconium Alloys

Steam oxidation resistance of plasma sprayed chromium‐containing coatings at 1200 °C

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