The invention discloses a bulletproof composite armor and a preparation method thereof, and belongs to the preparation technology of
ceramic and
metal-based composite materials. The preparation methodof the bulletproof composite armor comprises the following steps that 1, B4C
powder, carbon nanofibers, water-soluble phenolic resin and water are evenly mixed to obtain
ceramic slurry, then
spray drying is carried out to obtain a
raw material, then cold pressing is carried out to obtain a regular hexagon
green body; 2, the regular hexagon
green body is put into a
honeycomb of a faveolate carbonfiber mesh bag, the
honeycomb is covered with carbon
fiber cloth made of the same material, then vacuum hot-pressing
sintering is carried out, an integral
composite ceramic plate is formed; 3, the carbon nanofibers and aluminum
powder are evenly mixed, an aluminum
alloy bulletproof back plate is formed through
powder metallurgy,
forging forming and micro-arc oxidation treatment; and 4, the
composite ceramic plate and the aluminum
alloy bulletproof back plate are subjected to
hot isostatic pressing compounding, and the bulletproof composite armor is obtained. According to the bulletproof composite armor and a preparation method thereof, the mode that a high-
toughness composite ceramic is combined with the aluminum
alloy back plate is adopted, so that the capacity of the composite armor forresisting multiple strikes of armor-piercing bullets and armor-piercing incendiary bullets is greatly improved.