Research on Thermal Neutron Shielding Performance of TiB2-Al Composite Materials

Although the various excellent properties and preparation methods of TiB₂-based composites have been extensively studied, their neutron shielding properties have not received as much attention. In this article, the neutron shielding performance of the previously prepared TiB₂-Al composite will be studied. The photo neutron source device was used to carry out neutron irradiation tests on test samples with a thickness of 10 mm. The average thermal neutron shielding rate of TiB₂-based boron-containing composites is 17.55%, and the shielding rate increases with the increase of BN content. The macroscopic cross-section of thermal neutrons of the composites generally shows a stable trend, and when the BN content is 10%, the thermal neutrons macroscopic cross section reaches the maximum value of 7.58cm^-1. With the increase of the BN content, the thermal neutron fluence rate shows a gradually decreasing trend.