The Al-B4C composites is interestingly used for neutron shielding due to its light weight, high strength and neutron absorbing. But B4C aggregation and its low content are main problem during manufacturing process of Al-B4C composites. In order to solve these problems, this study applies a magnetic field based on traditional mechanical stirring and changes the blade to enhance the flow of the turbulent kinetic energy that maximizes molten aluminum stirring effects. Compared to the traditional mechanically stirring, Simulation and experimentation showed magnetic-mechanical coupled stirring has the higher turbulent kinetic energy, and the dead region greatly reduced. From the numerical investigations and experiments in the present work, an optimal configuration was selected based on the magnetic-mechanical coupled stirring in the particle distribution. Through optimized process, the Al-31%wt. B4C composites was successfully manufactured and with the B4C particles homogeneously distributed in matrix.
