Abstract

In this study, Al–20%B4C-x%(Sm, Sm2O3) (x = 1, 3, and 5) composites were prepared using mechanical alloying to investigate their neutron shielding and mechanical properties. After pelletizing and sintering the prepared powder composites, their microstructures were characterized using X-ray diffraction, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. Hardness, density, and corrosion tests were performed on the composites. Thermal and fast neutron shielding properties were calculated using the MCNP simulation code. Experimental measurements of neutron shielding were carried out using an Am–Be neutron source. Experimental results showed that 5% Sm-reinforced composites exhibited better neutron shielding than Sm2O3-reinforced composites at all doping ratios. Simulation calculations indicated that the highest thermal neutron shielding rate was observed in Sm-reinforced composites, while the highest fast neutron shielding rate was observed in 5% Sm2O3-reinforced composites. This research provides important data for researchers interested in developing thermal and fast neutron shielding materials.

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