Swift heavy ion irradiation induced interactions in the UMo/X/Al trilayer system (X=Ti, Zr, Nb, and Mo): RBS and μ-XRD studies

Abstract

Uranium-molybdenum (UMo) alloy embedded in an Al matrix (UMo/Al) has been considered as a promising candidate for fuel conversion of research reactors. A modified system with a diffusion barrier, UMo/X/Al trilayer (X = Ti, Zr, Nb, and Mo), has been investigated in order to suppress interdiffusion between UMo and the Al matrix. The trilayer was tested by swift heavy ion irradiation, followed by Rutherford backscattering spectroscopy (RBS) and Xray microdiffraction (µ-XRD). Atomic mixing at the interfaces was resolved by RBS, indicating that Ti interacts strongly with UMo while Zr does with Al. µ-XRD revealed the formation of intermetallic AlX compounds which can detain further atomic mixing. However, Ti and Zr as diffusion barrier can be controversial because their presence might lead to γ-UMo decomposition. This study presents the effectiveness of diffusion barriers and the irradiationinduced phase impacting on the properties of the UMo/X/Al trilayer.

MeV per nucleon ion irradiation of nuclear materials with high energy synchrotron X-ray characterization

“…Similar and often more dramatic changes in materials have been seen in the electronic stopping portion of ionic trajectories. [16][17][18] In the case of some ceramics for instance, 1-10 nm diameter cylinders of recrystallized materials have been measured along individual ion tracks. In a nuclear environment, with overlapping fission tracks it would be difficult to tease out the effects of these two very different mechanisms.…”

In situ модификация и анализ состава и кристаллической структуры кремниевой мишени с помощью ионно-пучковых методик

“…Например, в работе [10] при помощи РОР изучалась диффузия атомов золота в кремнии при разработке детекторов частиц высоких энергий. А в работе [11] было исследовано атомное перемешивание на границе раздела уран-молибденового сплава и алюми-ниевой матрицы для снижения потерь при обогащении ураном топливных элементов. При помощи метода РОР была обнаружена взаимная диффузия в зоне раздела между пленками BiFeO 3 (BFO) и подложками (Si (1 0 0), SiO 2 и SiO 2 /Si (1 0 0)) [12].…”