A 7.62mm rifle round will go through 3 inches of steel, so a catcher material is put behind the steel, he said.
“When the bullet hits the ceramic, it stops and absorbs the energy,” Portanova said. “The problem is you can only shoot it once because then it’s cracked.”
Composite metal foam, however, has a bunch of hollow spheres inside. When struck with a bullet, the spheres are crushed, similar to bubble wrap.
Because of its resilience, you can hit it numerous times, Portanova said.
http://www.militarytimes.com/news/2017/09/19/metal-foam-stops-bullets-without-cracking/
“When the bullet hits the ceramic, it stops and absorbs the energy,” Portanova said. “The problem is you can only shoot it once because then it’s cracked.”
Composite metal foam, however, has a bunch of hollow spheres inside. When struck with a bullet, the spheres are crushed, similar to bubble wrap.
Because of its resilience, you can hit it numerous times, Portanova said.
http://www.militarytimes.com/news/2017/09/19/metal-foam-stops-bullets-without-cracking/
