Protective Cr coatings with CrN/Cr multilayers for zirconium fuel claddings

Sidelev, Dmitrii V.; Ruchkin, Sergey; Сыртанов, М. С.; Kashkarov, Egor; Shelepov, Ivan; Malgin, A.G.; Polunin, K. K.; Stoykov, Kirill Vicheslavovich; Мокрушин, А. А.

doi:10.1016/j.surfcoat.2022.128131

Cited by 24 publications

(19 citation statements)

References 31 publications

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“…The Cr coatings with the ZrO 2 /Cr multilayers are further tilted as the "ZrO 2 /Cr-thickness (in nm)" coatings in this article. The E110 alloy samples with the single-layer Cr coating was also used from a previous study [18] for comparison.…”

Section: Experimental Details 21 Sample Preparationmentioning

confidence: 99%

“…Based on Figure 3, the weight gains of the samples with the ZrO 2 /Cr-100 and ZrO 2 /Cr-250 coatings (~1.0 g/dm 2 ) were higher than those of the samples with the ZrO 2 /Cr-750 and ZrO 2 /Cr coatings (~0.7 g/dm 2 ) after 50 cycles. The E110 alloy sample with a single-layer Cr coating had the same weight gain as the ZrO 2 /Cr-750 and ZrO 2 /Cr samples [18]. To identify a difference in weight gains of the samples, their cross-section microstructures were examined by optical microscopy and SEM after thermal cycling (Figures 4-6).…”

Section: The As-prepared Coatingsmentioning

confidence: 99%

“…The E110 alloy samples with the ZrO2/Cr coatings were oxidized in a water steam at 1200 °C for 1000 and 2000 s. Then, their weight gains were obtained and compared with the uncoated and the Cr-coated E110 alloy samples from ref. [18] (Table 3). The quantity of cracks and coating spallation in the samples is dependent on multilayer structure of the coatings.…”

Section: Steam Oxidation At 1200 °Cmentioning

confidence: 99%

“…The compound layers have better barrier performance than metals, but their cracking resistance is low due to different mechanical properties (hardness and elastic modulus) in comparison with Cr and Zr. Earlier, it was shown that metal/compound multilayers can be favorable to use as a barrier for Cr-Zr system [14,18]. Multilayer barriers can be more resistant to cracking under high-temperature ramps than that of single-layer compound barriers.…”

Section: Introductionmentioning

confidence: 99%

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Protective Cr Coatings with ZrO2/Cr Multilayers for Zirconium Fuel Claddings

et al. 2022

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This article described the protective properties of Cr coatings with a barrier layer composed of ZrO2/Cr multilayers deposited onto E110 zirconium alloy. The coatings with a ZrO2/Cr multilayer thickness of 100, 250, and 750 nm and single-layer (1.5 µm) ZrO2 barrier were obtained by multi-cathode magnetron sputtering in Ar + O2 atmosphere. Then, cracking resistance and oxidation behavior were studied under conditions of thermal cycling (1000 °C) in air and high-temperature oxidation at 1200–1400 °C in a water steam. The role of the ZrO2/Cr multilayers and multilayer thickness on cracking resistance of the experimental coatings and oxidation resistance of the coated E110 alloy was discussed. It was shown that the coatings with more quantity of the ZrO2/Cr multilayers have higher cracking resistance, but such types of samples have a large amount of coating spallation under thermal cycling. The high-temperature steam oxidation (1200–1400 °C) demonstrated that interfaces of the ZrO2/Cr multilayers can act as a source of cavities formed by the Kirkendall mechanism that results in accelerating Cr–Zr interdiffusion for Cr-coated E110 alloy.

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Section: Experimental Details 21 Sample Preparationmentioning

confidence: 99%

Section: The As-prepared Coatingsmentioning

confidence: 99%

Section: Steam Oxidation At 1200 °Cmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Protective Cr Coatings with ZrO2/Cr Multilayers for Zirconium Fuel Claddings

et al. 2022

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“…These coatings can be in multilayer or in gradient form. Kashkarov, Sidelev and colleagues are working on new promising Cr-based coatings for the nuclear fuel industry [17,18]. Investigated coatings are candidates for effective and reliable coatings for accident-tolerant fuel (ATF) under both normal operation (360 • C, 18.6 MPa) and accident (e.g., 1200 • C, water steam) scenarios.…”

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confidence: 99%