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Goodbye Tinfoil hats: Hello Metal Foam Armor
04-09-2016, 03:53 PM #1
Stiggy Member
Posts:383 Threads:32 Joined:Apr 2016
Quote:Bad news for bullets this week: Researchers at North Carolina State University have developed a super strong armor material that literally turns bullets to dust upon impact.

In a rather dramatic video recently posted online, an armor-piercing bullet is shown essentially disintegrating as it impacts the armor. Check it out:


the CMF plating has potential applications for space travel or even transporting nuclear waste, according to the research team. Earlier testing has demonstrated that CMFs can withstand extremely high temperatures and effectively block x-ray, gamma ray and neutron radiation.


It never mentions the weight of the armor.

Stopping a 30-06 M2 isn't actually that hard. A half inch of steel will do it easily.

Of course, a half inch steel plate is heavy and not the sort of thing an infantryman wants to have to wear. The newer armor is made of exotic materials.
04-09-2016, 03:59 PM #2
Octo Mother Superior
Posts:40,943 Threads:1,526 Joined:Feb 2011
Interesting... hmm.gif

Composite metal foams (CMFs) are tough enough to turn an armor-piercing bullet into dust on impact. Given that these foams are also lighter than metal plating, the material has obvious implications for creating new types of body and vehicle armor – and that's just the beginning of its potential uses.

Afsaneh Rabiei, a professor of mechanical and aerospace engineering at NC State, has spent years developing CMFs and investigating their unusual properties. The video seen here shows a composite armor 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). And 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." The results of that study were published in 2015.

But there are many applications that require a material to be more than just incredibly light and strong. For example, applications from space exploration to shipping nuclear waste require a material to be not only light and strong, but also capable of withstanding extremely high temperatures and blocking radiation.

Read more at: http://phys.org/news/2016-04-metal-foam-...llets.html
04-09-2016, 04:14 PM #3
JayRodney ⓐⓛⓘⓔⓝ
Posts:30,301 Threads:1,477 Joined:Feb 2011
Very interesting. The radiation containment aspect and the presumably light weight would most decidedly have aerospace applications, among so many others.

04-10-2016, 05:53 AM #4
bohica Member
Posts:1,545 Threads:206 Joined:Feb 2011
Mild steel weighs 40 lbs per square foot at 1" thick.
If a person wanted to use a 1/2" thick plate, 1 sq. ft., to protect Center Body Mass, front and back, he'd be lugging around 40 lbs of armor.
Ceramic plates are used extensively in body armors.

I'm in my seventh decade on Earth. I know things.



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