Investigation on the Neutron Transmission of B_4C/CF/PI/AA6061 Hybrid Composite Laminates: Experimental and Numerical Simulation Results

摘要

A novel neutron shielding B_(4)C/CF/PI/AA6061 composite laminate (NSCL) with different layups containing 10 to 50 wt% of boron carbide (B_(4)C) particles was successfully fabricated using a hot molding process. The effects of different B_(4)C loadings and various configurations on the neutron transmission of the NSCLs were evaluated correspondingly. The MCNP 5.0 program was used to probe the neutron transmission mechanism of the NSCLs. The results showed that B_(4)C particles are an effective absorbent, and neutron transmission of the NSCLs decreased with the increment of layups, B_(4)C loadings, and the laminate thickness. Fast neutrons emitted from a ~(241)Am-Be neutron source were first moderated by low atomic elements (hydrogen) and then absorbed by ~(10)B nuclide contained in the B_(4)C particles. Numerical simulation corroborated the experimental testing results.