Reaction of U-Mo alloy with Al

Uranium alloys with a high uranium density have been studied for a dispersion fuel in a research reactor. U-Mo alloy has been considered as one of the research reactor fuels. In spite of its good irradiation performance, these alloys react with the matrix to form an interdiffusion layer which leads to a volume expansion and a degradation of the thermal properties. The reaction between the U-7wt%Mo alloy and the Al matrix should be understood well to evaluate a fuel performance. In this study, the reaction layers in a U-7wt%Mo/Al diffusion couple were characterized by a micro X-ray diffraction system