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.

中文翻译：

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Sm-Sm2O3 增强 Al-B4C 复合材料的机械和辐射屏蔽性能研究


在本研究中，使用机械合金化制备了 Al-20%B4C-x%（Sm， Sm2O3） （x = 1、3 和 5） 复合材料，以研究其中子屏蔽和机械性能。对制备的粉末复合材料造粒和烧结后，使用 X 射线衍射、能量色散 X 射线光谱和扫描电子显微镜对其微观结构进行表征。对复合材料进行了硬度、密度和腐蚀测试。使用 MCNP 仿真代码计算热屏蔽和快中子屏蔽特性。中子屏蔽的实验测量是使用 Am-Be 中子源进行的。实验结果表明，在所有掺杂倍率下，5% Sm增强复合材料都表现出比Sm2O3增强复合材料更好的中子屏蔽性。仿真计算表明，在 Sm-增强复合材料中观察到最高的热中子屏蔽率，而在 5% Sm2O3-增强复合材料中观察到最高的快中子屏蔽率。这项研究为有兴趣开发热和快中子屏蔽材料的研究人员提供了重要数据。