Abstract One of the biggest challenges of nuclear industries is to fabricate safe, stable and efficient materials for the storage and transportation of spent nuclear fuels (SNFs), these materials are known as neutron shielding and absorbing materials. Recently, Gd has received much attention as a neutron absorbing material in SNF applications owing to its high neutron absorption capability. Herein, we propose novel Fe Gd alloys as binary alloys and master alloys for potential materials in nuclear applications. Fe Gd alloys with 20, 55 and 80 wt% Gd were selected based on the Fe Gd phase diagram. All fabricated Fe Gd alloys had higher hardnesses than pure Fe due to the formed Fe Gd phases, and the Fe-rich phase had a higher hardness than the Gd-rich phase. On the other hand, corrosion resistance of the Fe Gd alloys decreased as the Gd content increased. Satisfactory Gd-based intermetallic dispersion and modifying effects were obtained by casting Fe and stainless-steel alloy with Fe 80Gd. The average intermetallic size in the stainless-steel alloy remarkably decreased with a decrease in the average distance between Gd-based intermetallics. Fe Gd alloys possess requisite hardness, thermal conductivity, and corrosion resistance as well as dispersion ability of intermetallics; hence, they show potential as promising candidates for SNF applications.

中文翻译：

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Fe Gd 合金作为二元合金和中间合金用于潜在乏核燃料 (SNF) 应用的初步研究

摘要 核工业面临的最大挑战之一是制造安全、稳定和高效的乏核燃料（SNF）储存和运输材料，这些材料被称为中子屏蔽和吸收材料。最近，由于其高中子吸收能力，Gd 作为 SNF 应用中的中子吸收材料备受关注。在此，我们提出了新型 Fe Gd 合金作为二元合金和母合金，用于核应用中的潜在材料。基于 Fe Gd 相图选择了具有 20、55 和 80 wt% Gd 的 Fe Gd 合金。由于形成了 Fe Gd 相，所有制造的 Fe Gd 合金都具有比纯 Fe 更高的硬度，并且富 Fe 相比富 Gd 相具有更高的硬度。另一方面，Fe Gd 合金的耐蚀性随着 Gd 含量的增加而降低。用Fe 80Gd铸造Fe和不锈钢合金，获得了令人满意的Gd基金属间分散和改性效果。随着Gd基金属间化合物之间平均距离的减小，不锈钢合金中的平均金属间化合物尺寸显着减小。Fe Gd合金具有必要的硬度、导热性、耐腐蚀性以及金属间化合物的分散能力；因此，它们显示出作为 SNF 应用的有希望的候选者的潜力。随着Gd基金属间化合物之间平均距离的减小，不锈钢合金中的平均金属间化合物尺寸显着减小。Fe Gd合金具有必要的硬度、导热性、耐腐蚀性以及金属间化合物的分散能力；因此，它们显示出作为 SNF 应用的有希望的候选者的潜力。随着Gd基金属间化合物之间平均距离的减小，不锈钢合金中的平均金属间化合物尺寸显着减小。Fe Gd合金具有必要的硬度、导热性、耐腐蚀性以及金属间化合物的分散能力；因此，它们显示出作为 SNF 应用的有希望的候选者的潜力。