Abstract
Neutron shielding materials should have low density, high strength and excellent neutron shielding performance. Ceramic/epoxy composites are one of the candidates for such materials. In this study, neutron shielding composites with three-dimensionally interwoven structure were prepared with matrix of epoxy resin with B4C fine-powders and reinforcement of Al2O3–ZrO2 3D reticulated ceramic with Gd2O3-CA6 layer. The 3D reticulated ceramic was fabricated by polymer replica method. Vacuum infiltration with Al(OH)3/CaCO3/Cd2O3 slurry was used to enhance the properties and structure of 3D reticulated ceramic. Furthermore, the epoxy with 15 wt% B4C powders was also vacuum infiltrated into the ceramic skeletons to form neutron shielding composite materials with three-dimensionally interwoven structure. The as-prepared composite materials shielding rates of fast neutrons and thermal neutrons reached 26.5% and 89.4%, respectively. The bulk density and compressive strength reached 1.65 g/cm3 and 71.14 MPa, respectively. This study demonstrated an effective technique for preparing neutron shielding materials with excellent properties.
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