Hydrogen permeation behavior and mechanism of Cr2O3/Al2O3 bipolar oxide film under plasma discharging environment

Xin, Zhiyuan; Yin, Xiaoran; Ling, Yi; Zhang, Zhengjun; Liu, Xiao; Liang, Hao; Deng, Xiukun

doi:10.1016/j.ijhydene.2017.03.228

Cited by 29 publications

(3 citation statements)

References 37 publications

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“…The content of N was lower than that of O in XPS analysis in Figure 7, whereas the content of N was higher than that of O in AES analysis in Figure 5a, owing to the different analysis methods. Through literature [12,20,29] and consultation with XPS analysis specialist, the XPS was mainly used to determine the valence state of elements qualitatively, the content analysis was semi quantitative and less applied, and the quantitative analysis result of XPS was not as reliable as that of AES. The XPS narrow-spectrum analysis was measured at 30 nm, 200 nm, 600 nm, and 1000 nm, respectively, and the binding energy of C1s (284.8 eV) was used to calibrate the XPS peaks.…”

Section: Valence Statementioning

confidence: 99%

Hydrogen Permeation Behavior of Zirconium Nitride Film on Zirconium Hydride

et al. 2022

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Hydrogen permeation barrier plays an important role in reducing hydrogen loss from zirconium hydride matrix when used as neutron moderator. Here, a composite nitride film was prepared on zirconium hydride by in situ reaction method in nitrogen atmosphere. The phase structure, morphology, element distribution, and valence states of the composite film were investigated by XRD, SEM, AES, and XPS analysis. It was found that the composite nitride film was continuous and dense with about 1.6 μm thickness; the major phase of the film was ZrN, with coexistence of ZrO2, ZrO, and ZrN0.36H0.8; and Zr-C, Zr-O, Zr-N, O-H, and N-H bonds were detected in the film. The existence of ZrN0.36H0.8 phase and the bonds of O-H and N-H revealed that the nitrogen and oxygen in the film could capture hydrogen from the zirconium hydride matrix. The hydrogen permeation performance of nitride film was compared with oxide film by permeation reduction factor (PRF), vacuum thermal dehydrogenation (VTD), and hydrogen permeation rate (HPR) methods, and the results showed that the hydrogen permeation barrier effects of nitride film were better than that of oxide film. The zirconium nitride film would be a potential candidate for hydrogen permeation barrier on the surface of zirconium hydride.

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Section: Valence Statementioning

confidence: 99%

Hydrogen Permeation Behavior of Zirconium Nitride Film on Zirconium Hydride

et al. 2022

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“…In this paper, we focused our attention on hydrogen permeation barrier-like candidates (HPB), namely oxides and metals, proposing different configurations and investigating their structural integrity in order to provide a general insight prior to complex permeation measurements campaigns. Generally, oxides express different response to hydrogen permeability [5], thus they are highly applicable as permeation barrier candidates and as structural barrier materials in hydrogen storage devices [6], vacuum solar receivers [7], and fusion reactors [8,9]. Taking these facts into consideration, two oxides with different properties in relation to the hydrogen permeation were studied, namely chromium oxide with an applicable permeation reduction factor up to ~10 3 [2,[10][11][12] and the less studied silicon dioxide [13].…”

Section: Introductionmentioning

confidence: 99%

Surface, Structural, and Mechanical Properties Enhancement of Cr2O3 and SiO2 Co-Deposited Coatings with W or Be

et al. 2022

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Direct current (DC) and radio frequency (RF) magnetron sputtering methods were selected for conducting the deposition of structural materials, namely ceramic and metallic co-depositions. A total of six configurations were deposited: single thin layers of oxides (Cr2O3, SiO2) and co-deposition configurations (50:50 wt.%) as structural materials (W, Be)—(Cr2O3, SiO2), all deposited on 304L stainless steel (SS). A comprehensive evaluation such as surface topology, thermal desorption outgassing, and structural/chemical state was performed. Moreover, mechanical characterization evaluating properties such as adherence, nano indentation hardness, indentation modulus, and deformation relative to yielding, was performed. Experimental results show that, contrary to SiO2 matrix, the composite layers of Cr2O3 with Be and W exhibit surface smoothing with mitigation of artifacts, thus presenting a uniform and compact state with the best microstructure. These results are relevant in order to develop future dense coatings to be used in the fusion domain.

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“…The preparation processes of TPB generally consist of coating and in situ oxidation. Various coating methods with advantages of mature technology such as physical/chemical vapor deposition, plasma sputtering, sol-gel have been extensively investigated [5][6][7][8][9][10][11]. However, high risk of failure resulted from cracking or erosion still exists for all these coatings.…”

Section: Introductionmentioning

confidence: 99%

Fabricating tritium permeation barrier for PFC with a new non-coating strategy

Wang¹,

Zhou²,

Liu³

et al. 2021

Phys. Scr.

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Tritium (T) permeation through plasma-facing component (PFC) into the coolant is a major concern of fusion reactor operation. In this work, deuterium (D) permeation through CLAM steel, CLAM/CLAM and CLAM/Fe-Cr-Al samples prepared by hot isostatic pressing (HIP) are tested in a linear plasma device. Only the downstream surfaces of the samples are oxidized with controlled atmosphere to form permeation barrier. No significant effect on D diffusion and penetration can be observed for the joining interfaces, while the dense oxide layer at the downstream side plays an important role in suppressing D permeation. The downstream surface oxidization of CLAM/Fe-Cr-Al is found to effectively reduce D permeation flux by a factor up to 1000.

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Hydrogen permeation behavior and mechanism of Cr2O3/Al2O3 bipolar oxide film under plasma discharging environment

Cited by 29 publications

References 37 publications

Hydrogen Permeation Behavior of Zirconium Nitride Film on Zirconium Hydride

Hydrogen Permeation Behavior of Zirconium Nitride Film on Zirconium Hydride

Surface, Structural, and Mechanical Properties Enhancement of Cr2O3 and SiO2 Co-Deposited Coatings with W or Be

Fabricating tritium permeation barrier for PFC with a new non-coating strategy

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