Development and testing of multicomponent fuel cladding with enhanced accidental performance

Krejčí, Jakub; Kabátová, Jitka; Manoch, František; Kočí, Jan; Cvrček, Ladislav; Málek, Jaroslav; Krum, Stanislav; Šutta, P.; Bublíková, Petra; Halodová, Patricie; Namburi, Hygreeva Kiran; Ševeček, Martin

doi:10.1016/j.net.2019.08.015

Cited by 71 publications

(55 citation statements)

References 6 publications

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“…It is known that brittle CrN films can crack under high temperature oxidation or mechanical deformations [12,22]. No cracking was observed for the multilayer CrN/Cr-250 and CrN/Cr-500 coatings (Figure 4) in the present study.…”

Section: Discussioncontrasting

confidence: 39%

“…Further decomposition of the Cr2N phase at ~1000 °C led to the formation of a ZrN layer beneath the metallic (reduced) Cr layer. As indicated by Krejcí et al [12], a thin ZrN layer can prevent chromium diffusion into the Zr-alloy and consequent embrittlement. The comparative in situ XRD studies confirm this statement.…”

Section: Discussionmentioning

confidence: 93%

“…Firstly, the deposition of CrN instead of metallic chromium should enhance the oxidation resistance of coated alloy. Several comparative studies of oxidation behavior of CrN and Cr present questionable results due to the crucial role of CrN cracking in oxidation tests [12,14,22]. Thus, the oxidation kinetics of chromium nitride excluding cracking are still unclear.…”

Section: Discussionmentioning

confidence: 99%

“…The compound coatings (e.g., CrN, ZrSi2, etc.) can have better oxidation resistance than metallic Cr and act as a diffusion barrier [11][12][13][14][15]. However, high hardness and strong difference in thermal expansion coefficients of such materials in comparison with Zr alloys cause coating cracking and its spallation at high-temperature oxidation or under mechanical deformations [15].…”

Section: Introductionmentioning

confidence: 99%

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Protection of Zr Alloy under High-Temperature Air Oxidation: A Multilayer Coating Approach

et al. 2021

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Metallic Cr and multilayer CrN/Cr coatings with a thickness of 2.5 µm were deposited onto E110 alloy by magnetron sputtering. Oxidation tests in air were performed at 1100 °C for 10–40 min. The gravimetric measurements showed better protective properties of multilayer CrN/Cr coatings in comparison with metallic Cr coating. Multilayer coating prevented fast Cr–Zr inter-diffusion by the formation of a ZrN layer beneath the coating. The appearance of ZrN is caused by interaction with nitrogen formed from the decomposition of CrN to Cr2N phases. Optical microscopy revealed a residual Cr layer for the multilayer CrN (0.25 µm)/Cr (0.25 µm) coating for all the oxidation periods. Additional in situ X-ray diffraction (XRD) studies of coated alloy during linear heating up to 1400 °C showed that the formation of the Cr2Zr phase in the case of multilayer coatings occurred at a higher (~150 °C) temperature compared to metallic Cr. Multilayer coatings can decrease the nitrogen effect for Zr alloy oxidation. Uniform and thinner oxide layers of Zr alloy were observed when the multilayer coatings were applied. The highest oxidation resistance belonged to the CrN/Cr coating with a multilayer step of 0.25 µm.

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Section: Discussioncontrasting

confidence: 39%

Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Protection of Zr Alloy under High-Temperature Air Oxidation: A Multilayer Coating Approach

et al. 2021

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“…Over the years, many concepts of Accident Tolerant Fuels (ATFs) have been suggested [1]. The main objective of ATF is to mitigate the possible negative consequences occurring in accident conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Damaged Cr-Coated Fuel Cladding in Post-Accident Conditions

Cervenka

Krejčí

Cvrček

et al. 2020

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To enhance the safety of nuclear power, the focus of researchers all around the world has recently mainly objected on the development of Accident Tolerant Fuels. Especially the Chromium coating of current Zirconium based cladding has been widely suggested and discussed for its immense positive effect on overall cladding properties. Nevertheless, it was observed that during the first stage of the Loss of Coolant Accident, cracks appear in the Cr coating due to its inability to tolerate higher plastic strain. Therefore, experimental methodology used in this article focuses on testing fuel cladding with damaged Cr coating after the high-temperature transient. The impact of cracks on degradation of cladding mechanical properties was observed using optical microscopy, ring compression test, microhardness, and evaluating hydrogen content and weight gain.

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Unveiling the latest progresses in chromium-coated Zircaloy cladding ATF materials: Fabrication techniques, performance metrics, and beyond

Mohamed,

Karuppasamy,

Alrwashdeh

et al. 2024

Alexandria Engineering Journal

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Development and testing of multicomponent fuel cladding with enhanced accidental performance

Cited by 71 publications

References 6 publications

Protection of Zr Alloy under High-Temperature Air Oxidation: A Multilayer Coating Approach

Protection of Zr Alloy under High-Temperature Air Oxidation: A Multilayer Coating Approach

Experimental Study of Damaged Cr-Coated Fuel Cladding in Post-Accident Conditions

Unveiling the latest progresses in chromium-coated Zircaloy cladding ATF materials: Fabrication techniques, performance metrics, and beyond

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