Uranium-molybdenum (UMo) alloy powder embedded in an Al matrix is considered as a promising candidate for fuel conversion of research reactors. A modified system with a diffusion barrier X as coating, UMo/X/Al trilayer (X = Ti, Zr, Nb, and Mo), has been investigated to suppress interdiffusion between UMo and the Al matrix. The trilayer systems were tested by swift heavy ion irradiation, the thereby created interaction zone has been analyzed by scanning transmission electron microscopy (STEM) and energy-dispersive X-ray spectroscopy (EDX). Detailed structural characterization are presented and compared to earlier μ-XRD analysis.

嵌入铝基体中的铀钼（UMo）合金粉末被认为是研究反应堆燃料转化的有前途的候选者。已经研究了一种以扩散阻挡层X作为涂层的改性体系，即UMo / X / Al三层（X = Ti，Zr，Nb和Mo），以抑制UMo与Al基体之间的相互扩散。通过快速重离子辐射对三层体系进行了测试，由此产生的相互作用区已通过扫描透射电子显微镜（STEM）和能量色散X射线光谱仪（EDX）进行了分析。介绍了详细的结构表征，并与早期的μ-XRD分析进行了比较。