Jian Gan , Chao Jiang , Yizhi Zhang , Yifan Zhang , Jiawei Song , Ke Xu , Benson Kunhung Tsai , Xuanyu Sheng , Haiyan Wang , Yinbin Miao , Peter Mouche , Kun Mo , Bei Ye
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引用次数: 0
摘要
先进的堆芯对于快堆至关重要，它需要堆芯基体材料具有足够的导热性、机械稳定性和耐辐射性，堆芯表面具有耐腐蚀性和高温冷却剂兼容性，堆芯内壁具有抗燃料堆芯化学作用（FCCI）的化学稳定性。本文总结了最近对铈（Ce）/氧化物弥散强化钢（ODS）和Ce/TiN/ODS 两种扩散耦合样品进行离子辐照研究的初步结果，这些样品在 500°C 下被 80 MeV 氙（Xe）离子辐照到每原子 100 位移（dpa）。在 Ce/ODS 样品中发生了显著的 Ce-Fe 相互作用，而在 Ce/TiN/ODS 样品中没有发现明显的 Ce-Fe 相互作用。这表明脉冲激光沉积所镀上的 1 微米 TiN 扩散屏障能有效抑制 Ce-Fe 相互作用，而 Ce-Fe 相互作用是造成包层中 FCCI 的主要因素。对 TiN 的 Ti 亚晶格内 Ce 和 Fe 的杂质扩散率进行了密度函数理论 (DFT) 计算，以帮助从机理上理解实验结果。
Effect of TiN coating on suppressing Ce-Fe interaction under irradiation
Advanced cladding is critical for fast reactors with the adequate thermal conductivity, mechanical stability and radiation tolerance of the cladding base material, corrosion resistance and high temperature coolant compatibility of the cladding surface, and chemical stability of the cladding inner wall against fuel cladding chemical interaction (FCCI). The preliminary results of recent ion irradiation studies of two diffusion-couple samples of cerium (Ce)/oxide-dispersion strengthened steel (ODS) and Ce/TiN/ODS, irradiated with 80 MeV xenon (Xe) ions to 100 displacements per atom (dpa) at 500°C, are summarized. Significant Ce-Fe interaction occurred in the Ce/ODS sample, and no noticeable Ce-Fe interaction was found in the Ce/TiN/ODS sample. It shows the effectiveness of 1-µm TiN diffusion barrier coated by the pulsed laser deposition on suppressing Ce-Fe interaction, a major contributor to FCCI in cladding. Density function theory (DFT) calculations of the impurity diffusivities of Ce and Fe within the Ti sublattice of TiN were performed to assist a mechanistic understanding of the experimental results.
期刊介绍：
Materialia is a multidisciplinary journal of materials science and engineering that publishes original peer-reviewed research articles. Articles in Materialia advance the understanding of the relationship between processing, structure, property, and function of materials.
Materialia publishes full-length research articles, review articles, and letters (short communications). In addition to receiving direct submissions, Materialia also accepts transfers from Acta Materialia, Inc. partner journals. Materialia offers authors the choice to publish on an open access model (with author fee), or on a subscription model (with no author fee).
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