Evidence of amorphous interdiffusion layer in heavy ion irradiated U–8wt%Mo/Al interfaces

Kr implantation into heavy ion irradiated monolithic U–Mo/Al systems: SIMS and SEM investigations

“…Nano-X-ray diffraction and transmission electron microscopy measurements were performed on identically treated samples [15]. There it has been demonstrated that these irradiation conditions result in the growth of a 1 mm thick interaction layer between the UeMo and the Al substrate which is fully amorphous.…”

“…As a consequence, the growth of a 0.5 mm-sized UO 2 layer on top of the UeMo layer is expected [15]. According transmission electron microscopy measurements revealed this layer's nanocrystalline property, while nano-X-ray diffraction indicated some slight over-oxidation towards U 4 O 9 or U 3 O 7 [15]. According SRIM calculations were undertaken for Kr as well.…”

Ion beam induced spinodal decomposition and amorphization in the immiscible bilayer system UMo/Mg

“…below 10% of the peak burn-up of the FRM II fuel element [16]. The experimental set-up has been adapted to 140°C and 200°C, ensuring a stable irradiation temperature within a deviation of ±2°C [20].…”

“…This indicates the thermal effects play a role in atomic mixing. In comparison to the UMo/Al bilayer, the amorphous region found in the UMo/Mg bilayer has only around 1 10 thickness after swift heavy ion irradiation at comparable total fluences [20,29]. This difference arises from the different chemical affinities of the matrix materials towards U.…”

Irradiation behavior study of U–Mo/Al dispersion fuel with high energy Xe

“…The advantages of using ion irradiation as a surrogate for in-reactor testing are rapid accumulation of damage under controllable conditions and simple accessibility of samples as handling of highly radioactive materials is not involved. Previous studies [27,[31][32][33][34][35] have shown that well-controlled ion irradiation on dispersion fuels can help to understand the underlying mechanisms of dispersion fuel behavior and optimize the material matrix for in-pile tests. This paper reports the unique set up of the irradiation and preliminary PIE results obtained.…”