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Preparation and characterization of Er_2O_3-ZrO_2 multi-layer coating for tritium permeation barrier by metal organic decomposition

机译:金属有机分解制备tri渗透阻挡层Er_2O_3-ZrO_2多层涂层的表征

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摘要

Tritium permeation barrier coatings have been investigated for several decades to control tritium migration in fusion reactor fuel systems. In liquid lithium-lead blanket concepts, mitigation of not only tritium permeation through but also corrosion of structural materials is seriously required. In this study, for the development of a multifunctional coating, Er2O3-ZrO2multi-layer coatings were prepared on reduced activation ferritic/martensitic steel substrates by metal organic decomposition. The deuterium permeability of the coated sample was three orders of magnitude lower than that of uncoated substrate in the first permeation experiment at 400 °C, and the high permeation reduction was kept in the temperature range of 400–650 °C. The coatings remained all over the sample surface after Li-Pb immersion experiments at 500–600 °C for 500 h, but were damaged at 600 °C. No reduction in coating thickness was confirmed after immersion at 550 °C by cross-sectional observation, suggesting that the multi-layer coatings may be applicable to the liquid lithium-lead blankets.
机译:control渗透阻隔涂层已被研究了数十年,以控制聚变反应堆燃料系统中的migration迁移。在液态锂铅毯概念中,不仅需要缓解through的渗透,而且还要求缓解结构材料的腐蚀。在这项研究中,为开发多功能涂层,通过金属有机分解在还原活化的铁素体/马氏体钢基材上制备了Er2O3-ZrO2多层涂层。在400 C的第一次渗透实验中,涂覆样品的氘渗透率比未涂覆的底物的氘渗透率低三个数量级,并且在400-650 C的温度范围内保持了较高的渗透率。 Li-Pb浸入实验在500–600 C下进行500 h后,涂层仍保留在整个样品表面,但在600 C下被破坏。通过横截面观察,在550°C的温度下浸泡后,未发现涂层厚度减少,这表明该多层涂层可能适用于液态锂铅橡皮布。

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