An efficient PDA/Al2O3 nanosheets reinforced ultra-thin ZrO2 coating with attractive anti-corrosion and deuterium resistance property

Zheng, Zhongyang; Li, Heping; Li, Fangjian; Zheng, Liyu; Yin, Shenming; Wang, Xinyun; Yan, Yunjun

doi:10.1016/j.cej.2022.138307

Cited by 16 publications

(9 citation statements)

References 42 publications

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“…The deuterium PRF, an important index for evaluating the performance of the hydrogen permeation barrier, is defined as the quotient of the permeabilities of the substrate and coated sample. A device, as described in ref was applied for measuring the deuterium permeability, which was separated by the sample into upstream and downstream chambers. Before the test, these chambers were pumped to a high vacuum (below 1 × 10 –5 Pa) by mechanical and molecular pumps.…”

Section: Methodsmentioning

confidence: 99%

“…Advancements in nuclear fusion energy and hydrogen power have created an urgent need for materials possessing high resistances against hydrogen isotopes (hydrogen, deuterium, and tritium) to prevent them from permeating the surfaces of metals on which they have been deposited. , Because of their small atomic radii and high solubilities, hydrogen isotopes can rapidly diffuse in metals, especially at high temperatures. , This inevitably causes the hydrogen embrittlement of metals, leading to their failure during service . Moreover, for nuclear fusion reactors, in which deuterium and tritium are used as fusion fuels, hydrogen isotope permeation not only leads to fuel leakage but also contaminates the environment with radioactive tritium.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Internal Stress and Hydrogen Penetration on the Performance of Er₂O₃ Coatings as Hydrogen Permeation Barriers

Zheng,

Yang,

Yan

et al. 2024

ACS Appl. Mater. Interfaces

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Ceramic coatings that can effectively prevent hydrogen permeation have a wide range of applications in hydrogen energy and nuclear fusion reactors. In this study, for the first time, the internal stress of Er 2 O 3 coatings was found to be a key factor that could determine their hydrogen permeation resistance and lifespan. The internal stress was controlled by designing layered Er 2 O 3 coatings. The internal stress increased with an increasing number of Er 2 O 3 layers. When the number of layers was below 15, the increased internal stress did not adversely affect the coating performance and might help to increase its hydrogen permeation resistance. Although the overall thickness of the 15-layer Er 2 O 3 coating was only 97 nm, its hydrogen permeation reduction factor (PRF) reached the highest value of 626, whereas a further increase in the internal stress detrimentally affected the ability of the coating to reduce hydrogen permeation. In addition, the experimental observations and simulation results revealed that the performance of the Er 2 O 3 coatings was related to the hydrogen atoms that penetrated the coating, which weakened the Er−O bonds and consequently decreased the Er 2 O 3 fracture limit. This study provides insights into the effects of internal stress and hydrogen penetration on the performance of ceramic coatings as hydrogen permeation barriers and will help guide strategies for the structure design of hydrogen permeation barriers possessing high PRFs and long lifespans.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er₂O₃ Coatings as Hydrogen Permeation Barriers

Zheng,

Yang,

Yan

et al. 2024

ACS Appl. Mater. Interfaces

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“…It is worthy to note that only one face of the steel substrate was coated with α-Al 2 O 3 . In our homemade gas-driven deuterium permeation device, 31,32 the upstream and downstream chambers are separated by the sample. Deuterium gas is introduced into the upstream chamber when the vacuum of the two chambers drops below 10 −4 Pa. Once deuterium atoms penetrate through the sample and enter into the downstream chamber, their ion current is tracked timely by a quadrupole mass spectrometer (QMS) equipped.…”

Section: Deuterium Gas Permeation Testmentioning

confidence: 99%

Thermochemically synthesized α‐Al₂O₃ composite coating with high bonding strength and deuterium permeation resistance

Li,

Zheng,

Liu

et al. 2023

J Am Ceram Soc.

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Hydrogen isotope permeation in structural steels can cause severe issues, including steel brittleness, fuel loss, and radioactive pollution in fusion reactors. To tackle this issue, we report a simple synthesis of α‐Al2O3/AlPO4 composite coating by the thermochemical reaction method to serve as an effective barrier hampering hydrogen isotope permeation. This coating was formed at 500°C and composed of α‐Al2O3 and AlPO4 phases. A relatively uniform and compact structure with thickness of ∼35 μm made its corrosion resistance reaching above 3000 times that of the 321 steel substrate. With just one‐side coated, the α‐Al2O3/AlPO4 coating achieved a considerable deuterium permeation reduction factor of 1935 at 450°C, three orders of magnitude higher than 321 steels. What's more, after the deuterium permeation test, no pores or cracks were generated. The excellent bonding between the coating and the substrate was resulted from the formation of CrxPy at their interface induced by Cr diffusion from the substrate. The results obtained from the current study shed new light on seeking reliable and viable ceramic coatings to tackle hydrogen permeation issues.

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“…The permeation reduction factor (PRF) and permeation flux are two important indexes that are used to measure the performance of a deuterium permeation barrier. The self-constructed gasdriven deuterium permeation test device was depicted in our previous work [22][23][24][25][26], which is separated by the sample into upstream and downstream cavities. A dynamic vacuum (10 −5 Pa) is kept in the upstream and downstream cavities by two molecular pumps.…”

Section: Deuterium Permeation Experimentsmentioning

confidence: 99%

Effect of Cr₂O₃ nanosheet insertion on the deuterium permeation behavior of a Cr-Zr-O coating

Tian¹,

Li²,

Zheng³

et al. 2022

Plasma Sci. Technol.

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In this study, the Cr2O3 nanosheet (Cr2O3 NS) reinforcing Cr-Zr-O coating was developed as hydrogen isotope permeation barrier. The effect of Cr2O3 nanosheet concentration on morphology, microstructure and deuterium permeation resistance of the coating was studied. With 1.0 g/l Cr2O3 nanosheets addition, PRF of the resulted coating was enhanced by 130 % as compared with the Cr-Zr-O coating without nanosheets. The hybrid coating, with a thickness of nearly 193 nm, achieved a comparable deuterium resistance that is above two orders of magnitude higher than the steel substrate. The results show that ceramic nanosheets can serve as effective fillers for enhancing the coating performance when functioned as hydrogen isotope barrier.

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An efficient PDA/Al2O3 nanosheets reinforced ultra-thin ZrO2 coating with attractive anti-corrosion and deuterium resistance property

Cited by 16 publications

References 42 publications

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er₂O₃ Coatings as Hydrogen Permeation Barriers

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er₂O₃ Coatings as Hydrogen Permeation Barriers

Thermochemically synthesized α‐Al₂O₃ composite coating with high bonding strength and deuterium permeation resistance

Effect of Cr₂O₃ nanosheet insertion on the deuterium permeation behavior of a Cr-Zr-O coating

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An efficient PDA/Al2O3 nanosheets reinforced ultra-thin ZrO2 coating with attractive anti-corrosion and deuterium resistance property

Cited by 16 publications

References 42 publications

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er2O3 Coatings as Hydrogen Permeation Barriers

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er2O3 Coatings as Hydrogen Permeation Barriers

Thermochemically synthesized α‐Al2O3 composite coating with high bonding strength and deuterium permeation resistance

Effect of Cr2O3 nanosheet insertion on the deuterium permeation behavior of a Cr-Zr-O coating

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Effects of Internal Stress and Hydrogen Penetration on the Performance of Er₂O₃ Coatings as Hydrogen Permeation Barriers

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er₂O₃ Coatings as Hydrogen Permeation Barriers

Thermochemically synthesized α‐Al₂O₃ composite coating with high bonding strength and deuterium permeation resistance

Effect of Cr₂O₃ nanosheet insertion on the deuterium permeation behavior of a Cr-Zr-O coating