Synergistic corrosion mechanisms in ceramic and ceramic-iron joint coatings under lithium-lead exposure and gamma-ray irradiations

IF 3.2 2区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Nuclear Materials Pub Date : 2025-08-29 DOI:10.1016/j.jnucmat.2025.156132

Hnin Lai Lai Wai , Kento Shirota , Ryosuke Norizuki , Khiem Do-Duy , Hiroyuki Noto , Teruya Tanaka , Juro Yagi , Takuya Nagasaka , Takumi Chikada

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Abstract

In the fusion reactor advanced blanket concepts, considerable attention has always been directed towards the materials employed for the coolants/breeders because the blanket components will be exposed to a harsh environment, including neutron/gamma-ray irradiation and high-temperature tritium breeders. Multifunctional ceramic coatings have been studied to reduce hydrogen isotope permeation, electrical conductivity, and corrosion of structural materials. For the sustainable development of a liquid blanket system, the coatings require not only permeation reduction but also resistance to irradiation damage, which is invisible, accumulative, and can be able to unexpected failure within a short period. In this study, the synergistic corrosion mechanisms of Li-Pb compatibility for the blanket materials were investigated through Li-Pb exposure tests under gamma-ray irradiation. A liquid-phase method and a hot-isostatic pressing were applied for the formation of ceramic-iron joint coatings on the inner wall of a steel tube. In static and flowing Li-Pb exposure tests under gamma-ray irradiation, the joint coatings and multi-layer coatings indicated superior corrosion resistance.

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锂铅暴露和γ射线辐照下陶瓷和陶瓷-铁接头涂层的协同腐蚀机制

在聚变反应堆先进的包层概念中，冷却剂/增殖剂所用的材料一直受到相当大的关注，因为包层组件将暴露在恶劣的环境中，包括中子/伽马射线照射和高温氚增殖剂。研究了多功能陶瓷涂层在降低结构材料氢同位素渗透、电导率和腐蚀方面的作用。为了液体涂层系统的可持续发展，涂层不仅需要减少渗透，还需要抵抗辐射损伤，而辐射损伤是无形的、累积的，并且可以在短时间内发生意外失效。本研究通过伽马射线辐照下的Li-Pb暴露试验，研究了Li-Pb相容性对毡材的协同腐蚀机理。采用液相法和热等静压法制备了钢管内壁陶瓷-铁接头涂层。在γ射线照射下的静态和流动Li-Pb暴露试验中，接缝涂层和多层涂层表现出较好的耐蚀性。

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来源期刊

Journal of Nuclear Materials 工程技术-材料科学：综合

CiteScore

5.70

自引率

25.80%

发文量

601

审稿时长

63 days

期刊介绍： The Journal of Nuclear Materials publishes high quality papers in materials research for nuclear applications, primarily fission reactors, fusion reactors, and similar environments including radiation areas of charged particle accelerators. Both original research and critical review papers covering experimental, theoretical, and computational aspects of either fundamental or applied nature are welcome. The breadth of the field is such that a wide range of processes and properties in the field of materials science and engineering is of interest to the readership, spanning atom-scale processes, microstructures, thermodynamics, mechanical properties, physical properties, and corrosion, for example. Topics covered by JNM Fission reactor materials, including fuels, cladding, core structures, pressure vessels, coolant interactions with materials, moderator and control components, fission product behavior. Materials aspects of the entire fuel cycle. Materials aspects of the actinides and their compounds. Performance of nuclear waste materials; materials aspects of the immobilization of wastes. Fusion reactor materials, including first walls, blankets, insulators and magnets. Neutron and charged particle radiation effects in materials, including defects, transmutations, microstructures, phase changes and macroscopic properties. Interaction of plasmas, ion beams, electron beams and electromagnetic radiation with materials relevant to nuclear systems.