Abstract Alloying additions are introduced into U-Zr fuel in order to bind lanthanides (e.g., cerium) and prevent their migration to the fuel-cladding interface. Antimony (Sb) is being investigated as a candidate additive. The present study focuses on the diffusion couple behavior of U-10Zr (wt%) alloy with Sb against cladding (iron or HT9) at 640°C. The diffusion cross sections were analyzed using a scanning electron microscope and X-ray diffraction. Zr-rind was found at the interface of the fuel alloy, Sb was found to be bound in Sb-Zr precipitates or Sb-Ce precipitates, and no reaction was found between Sb precipitates and the cladding materials.

中文翻译：

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含Sb添加剂的UZr燃料与包壳之间扩散偶测试FCCI的实验研究

摘要 合金添加剂被引入到 U-Zr 燃料中，以结合镧系元素（例如，铈）并防止它们迁移到燃料包壳界面。正在研究锑 (Sb) 作为候选添加剂。本研究的重点是 U-10Zr (wt%) 合金与 Sb 在 640°C 下对包层（铁或 HT9）的扩散耦合行为。使用扫描电子显微镜和 X 射线衍射分析扩散截面。在燃料合金的界面处发现 Zr-rind，发现 Sb 结合在 Sb-Zr 沉淀或 Sb-Ce 沉淀中，并且发现 Sb 沉淀与包覆材料之间没有反应。