Effect of thermal cycles on structure and deuterium permeation of Al2O3 coating prepared by MOD method

Zhu, Changda; Zhang, Wei; Long, Wang; Ning, Zhien; Feng, Yongjin; Feng, Kai-Ming; Liao, Jiali; Yang, Yanjun; Liu, Ning; Yang, Jijun

doi:10.1016/j.fusengdes.2020.111750

Cited by 14 publications

(3 citation statements)

References 34 publications

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“…Even though deuterium permeability of the α‐Al 2 O 3 /AlPO 4 coating is similar to each other at 400 and 450°C, the permeability of the substrate at 450°C is above two times that at 400°C, leading to a significant increase in PRF value from 915 to 1935 on the basis of Equation (). Figure 7D compares the PRF achieved in this work with that of other coatings tested at 400 and 450°C as reported previously 5,43–50 . It is intriguing to find that PRF of the α‐Al 2 O 3 /AlPO 4 coating significantly exceeds the value of the coatings reported in the literatures that is almost below 1000.…”

Section: Resultssupporting

confidence: 78%

“…Figure 7D compares the PRF achieved in this work with that of other coatings tested at 400 and 450 • C as reported previously. 5,[43][44][45][46][47][48][49][50] It is intriguing to find that PRF of the α-Al 2 O 3 /AlPO 4 coating significantly exceeds the value of the coatings reported in the literatures that is almost below 1000. One reason for the big advancement of deuterium resistance is the compact structure of the coating as evidenced in the aforementioned analysis.…”

Section: Deuterium Permeation Reduction Of the α-Al 2 O 3 Composite C...mentioning

confidence: 88%

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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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Section: Resultssupporting

confidence: 78%

Section: Deuterium Permeation Reduction Of the α-Al 2 O 3 Composite C...mentioning

confidence: 88%

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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“…Thus, based on X-ray diffraction analysis, it can be assumed that an increase in the volume fraction of α-Al 2 O 3 phase in coatings leads to an increase in their wear resistance. This is because α-Al 2 O 3 has a number of features, including low density, relatively high melting point, excellent corrosion and wear resistance, and high strength at high temperatures [33][34][35]. Figure 9 shows the graphs of the friction coefficients of coatings obtained when filling the barrel by 53%, 58%, 63% and 68%.…”

Section: Resultsmentioning

confidence: 99%

Influence of Detonation-Spraying Parameters on the Phase Composition and Tribological Properties of Al2O3 Coatings

et al. 2021

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Al2O3 coatings were applied on the surface of 12Ch18N10T steel by the detonation method at different degrees of filling of the detonation gun. The aim was to study the influence of technological parameters on the formation of the coating’s structure, phase composition and tribological characteristics. The degree of filling the gun with a gas mixture (C2H2/O2) varied from 53% to 68%. X-ray diffraction study showed that the content of α-Al2O3 increases depending on the degree of filling. The results showed that the hardness increases with an increase in the α-Al2O3 phase. When the gun is 53% filled with gas, the Al2O3-based coating has the hardness of 20.56 GPa compared to 58%, 63% and 68% fillings. Tribology tests have shown that the wear rate and friction coefficient of the coating is highly dependent on the degree of filling of the gun.

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Electrically Insulating Corrosion-Resistant Tritium Permeation Barrier Coatings for High Temperature Liquid Metal Breeders of Nuclear Fusion Reactors

Saraswat,

Sasmal,

Prajapati

et al. 2023

Engineering Materials

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Effect of thermal cycles on structure and deuterium permeation of Al2O3 coating prepared by MOD method

Cited by 14 publications

References 34 publications

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

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

Influence of Detonation-Spraying Parameters on the Phase Composition and Tribological Properties of Al2O3 Coatings

Electrically Insulating Corrosion-Resistant Tritium Permeation Barrier Coatings for High Temperature Liquid Metal Breeders of Nuclear Fusion Reactors

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Effect of thermal cycles on structure and deuterium permeation of Al2O3 coating prepared by MOD method

Cited by 14 publications

References 34 publications

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

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

Influence of Detonation-Spraying Parameters on the Phase Composition and Tribological Properties of Al2O3 Coatings

Electrically Insulating Corrosion-Resistant Tritium Permeation Barrier Coatings for High Temperature Liquid Metal Breeders of Nuclear Fusion Reactors

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Product

Resources

About

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

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