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Runaway1956 [soylentnews.org] writes:

Armor-Piercing Bullet Turned to Dust When Fired at Composite Metal Foam

Essentially a metal sponge consisting of hollow metal beads within solid metal, composite metal foam (CMF) generally retains some physical properties of its base materials. While its defining characteristic is ultra-high porosity, CMF boasts 5 to 6 times greater strength as well as over 7 times higher energy absorption than previously developed metal foams. Typically created by melting aluminum around hollow metal spheres, it is impressively 70% lighter than sheet metal and 80 times more energy absorbent than steel.

The foam is claimed to be non-toxic, resistant to radiation, fire and heat resistant.

http://www.breitbart.com/tech/2016/04/21/watch-armor-piercing-bullet-turned-to-dust-when-fired-at-composite-metal-foam/ [breitbart.com]

Youtube video (13 seconds) https://www.youtube.com/watch?v=lWmFu-_54fI [youtube.com]

Related video (2:30) demonstrates automotive and other applications https://www.youtube.com/watch?v=7uE_f9rXLlk [youtube.com]

Slightly different coverage at https://newatlas.com/metal-foam-bullets/42731/ [newatlas.com]

Another Youtube video, demonstrating an explosion - https://youtu.be/yMVEQh5Akcc [youtu.be]

Original Submission