Synthesis of plasma-nitrided Cr coatings on HT9 steel for advanced chemical barrier property in a nuclear cladding application

Yeo, Sunghwan; Lee, Cheol Min; Yoon, Han Young; Kim, Junhwan

doi:10.1016/j.apsusc.2021.152133

Cited by 15 publications

(4 citation statements)

References 42 publications

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“…Nevertheless, the current research mainly focuses on hard coatings and soft coatings containing metal combinations (for instance, Cr, Ti, and Zr). Research on the characteristics of single metal-coated cemented carbide is still highly lacking [32][33][34][35]. It is necessary to comprehensively study the tribological behavior of pure metal-coated carbide to expand the application range.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Tribology Properties of Cr-Coated Cemented Carbide under Dry Friction Conditions

Zhang

Song

et al. 2023

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To improve the surface friction characteristics of cemented carbide, a Cr coating was deposited on cemented carbide substrate with the multiple arc plating technique. The surface and cross-section micrographs, adhesion force and micro-hardness of the Cr-coated cemented carbide were tested. The anti-friction and anti-wear behaviors of cemented carbide with and without Cr coating were investigated via the sliding friction test against a WC/Co ball. The tribological properties of cemented carbide were examined using a scanning electron microscope and energy dispersive X-ray analysis. The test results showed that Cr-coated cemented carbide possessed good adhesion properties and lower hardness. The average coefficient of friction for Cr-coated cemented carbide was reduced by 10–20% compared with that of an uncoated one. The primary wear modes of the Cr-coated sample were delamination of coating, flaking and abrasion wear. It can be found that the preparation of a Cr coating is an effective way to enhance the friction and wear performance of traditional cemented carbide.

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Section: Introductionmentioning

confidence: 99%

Fabrication and Tribology Properties of Cr-Coated Cemented Carbide under Dry Friction Conditions

Zhang

Song

et al. 2023

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“…Chromium nitride (CrN x ) coatings have been developed since the 1980s and early 1990s due to the need to obtain coatings with a higher hardness than TiN [ 23 ]. CrN x is a strong and corrosion-resistant compound that has uses in a variety of areas, including medical implants [ 24 ], silver lustre ornamental coatings [ 25 ], and wear-resistant coatings for cutting tools, particularly where temperature corrosion resistance is required [ 26 , 27 , 28 , 29 , 30 ]. Chromium nitride is an interstitial compound in which nitrogen atoms reside in the octahedral spaces between the chromium atoms in an fcc lattice (i.e., NaCl), making the compound prone to stoichiometry deficiency.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Testing of CrNx-Coated 310 H Stainless Steel under Simulated Supercritical Water Conditions

et al. 2022

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The paper’s aim is the assessment of corrosion behaviour of a CrNx-coated 310 H stainless steel under simulated supercritical water conditions (550 °C and 25 MPa) for up to 2160 h. The CrNx coating was obtained by the thermionic vacuum arc (TVA) method. The oxides grown on this coating were characterized using metallographic and gravimetric analysis, SEM with EDS, and grazing incidence X-ray diffraction (GIXRD). A diffusion mechanism drives oxidation kinetics because it follows a parabolic law. By XRD analysis, the presence of Cr2O3 and Fe3O4 on the surface of the autoclaved CrNx-coated 310 H samples were highlighted. Corrosion susceptibility assessment was performed by electrochemical impedance spectroscopy (EIS) and linear potentiodynamic polarization. EIS impedance spectra show the presence of two capacitive semicircles in the Nyquist diagram, highlighting both the presence of the CrNx coating and the oxide film formed during autoclaving on the 310 H stainless steel. Very low corrosion rates, with values up to 11 nm × year−1, obtained in the case of autoclaved for 2160 h, CrNx-coated samples indicated that the oxides formed on these samples are protective and provide better corrosion resistance. The determination of micro hardness Vickers completed the above investigation.

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“…Yeom et al (2019) studied the corrosion resistance of zircalloy cladding, which was coated with Cr in high-temperature steam, and the results also showed that Cr coating provided stable corrosion resistance for zircalloy cladding. Recently, Yeo et al (2022) studied the barrier effect of plasma nitride Cr coating and untreated Cr coating on chemical elements, and the results of the study showed that plasma nitride Cr coating has better chemical barrier effect. Lee et al (2019) studied the corrosion resistance of SiC/SiC composite cladding coated with Cr in high-temperature steam.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Tritium Diffusion Behavior in FeCrAl Cladding

et al. 2022

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In this article, a simulation code for tritium diffusion behavior analysis in FeCrAl cladding is developed based on the COMSOL platform. The simulated results are in good agreement with experimental and theoretical results. The effects of different concentrations of tritium and temperature distributions on the diffusion behavior of tritium in FeCrAl cladding were further investigated. Finally, the optimal effect of different coating schemes on the tritium resistance of the FeCrAl cladding was investigated. The results show that higher temperatures lead to higher cladding diffusion coefficients, which will further lead to higher fluxes of tritium into and out of the cladding, which is found to further result in a higher tritium flux into and out of the cladding, as well as shorter tritium diffusion times. It is found that higher temperature will lead to more tritium flux into and out of the cladding and shorter time for the tritium flux to reach a steady state on the right side of the cladding. At the same time, the higher tritium partial pressure on the fuel side of the cladding will lead to a longer time for the tritium flux to reach a steady state on the water side of the cladding. The longer time to reach the steady state on the water side of the cladding increases the tritium flux into the cladding.

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Synthesis of plasma-nitrided Cr coatings on HT9 steel for advanced chemical barrier property in a nuclear cladding application

Cited by 15 publications

References 42 publications

Fabrication and Tribology Properties of Cr-Coated Cemented Carbide under Dry Friction Conditions

Fabrication and Tribology Properties of Cr-Coated Cemented Carbide under Dry Friction Conditions

Corrosion Testing of CrNx-Coated 310 H Stainless Steel under Simulated Supercritical Water Conditions

Numerical Simulation of Tritium Diffusion Behavior in FeCrAl Cladding

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