Preparation and ballistic resistance of B₄C-Al foam composites with a bilayer structure

Hot-pressed boron carbide and aluminum foams were connected by epoxy resin to prepare bilayer composite materials.The ballistic resistance of the composite materials was investigated by ballistic testing using the materials as target plates. Armor piercing projectiles,7.62 and 12.7 mm in caliber,respectively,were used as test projectiles. The impact velocity was probably of the order of 820 m·s^-1and the shooting distance was 10 m. It is found that the composite materials have good ballistic resistance to 7.62 mm-caliber armor piercing projectiles,with the protecting factor in the range of 5.06 to 5.12.