New Material in The Armor Scene
Composite metal foams (CMFs) could drastically improve the strength of armor as well as increase shielding from radiation, heat and high-speed kinetic impacts. CMFs, like other foam metals, are made by injecting gas bubbles into molten metal, which then forms a mixture that sets into a matrix. The resulting material retains the strength of the original metal, but is substantially lighter.
In comparison to other metal foams, CMFs have five to six times greater strength-to-density ratio and over seven times higher energy absorption, Afsaneh Rabiei, professor in the department of mechanical and aerospace engineering at North Carolina State University, told engineering.com.
To test CMF strength, Rabiei applied CMFs as the absorber layer between a boron carbide ceramic plate and Kevlar panels. This CMF-based body armor was able to withstand a round from a battle rifle and an armor-piercing projectile.
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