Boron carbide material high neutron capture cross section, fast absorption spectrum, no secondary contamination, and corrosion resistance, wear resistance, good thermal stability, is a promising new reactor neutron absorption material, boron carbide/polymer composites are often used for neutron shielding protection, lead boron polyethylene, for example, since the mid - 1970 - s, Many kinds of pb - B - PE products have been used in American nuclear power plant reactors.