Ever heard of “Composite Metal Foams” (CMFs)? Turns out, this technology has been around for quite a while and has a wide range of applications. These materials are tough enough to turn an armor-piercing bullet into dust on impact but weigh a fraction of plate armor.
Afsaneh Rabiei, a professor of mechanical and aerospace engineering at NC State, has spent years developing CMFs. The video below shows a specimen made out of her composite metal foams. The bullet in the video is a 7.62 x 63 millimeter M2 armor piercing projectile, which was fired according to the standard testing procedures established by the National Institute of Justice (NIJ). As you can see, the results were dramatic.
“We could stop the bullet at a total thickness of less than an inch, while the indentation on the back was less than 8 millimeters,” Rabiei says. “To put that in context, the NIJ standard allows up to 44 millimeters indentation in the back of an armor.”
Check it out:
SOURCE: NC State University