October 23, 2021

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Nanofabricated ‘tetrakaidecahedrons’ might out-bulletproof kevlar – TechCrunch

Researchers at MIT and Caltech have created a nano-engineered materials that might be harder than the likes of kevlar or metal. Product of interconnected carbon “tetrakaidecahedrons,” the fabric absorbed the influence of microscopic bullets in spectacular trend.

The examine, led by MIT’s Carlos Portela, aimed to seek out out whether or not nanoarchitected supplies — that’s, designed and fabricated on the scale of nanometers — might be a viable path in direction of ultra-tough blast shields, physique armor, and different protecting surfaces.

The thought of tetrakaidecahedron-based supplies, nevertheless, isn’t a brand new one. The complicated 14-sided class of polyhedron (there are about 1.5 billion attainable variations) was proposed by Lord Kelvin within the nineteenth century as theoretically some of the environment friendly attainable for filling area with duplicates of itself.

If many such polyhedra will be packed right into a small area and interconnected, Portela and his colleagues questioned, would they act as an environment friendly shock absorber? Such supplies had been examined with sluggish deformations however not highly effective impacts such as you would count on from a bullet or micrometeoroid.

To search out out, they assembled blocks of the fabric by way of nanolithography methods, baking the ensuing construction till it was pure carbon. Then they shot these carbon constructions with 14-micron-wide silicon oxide bullets touring effectively above the velocity of sound (although at these scales, the comparability is a bit quaint).

Picture Credit: MIT/Caltech

The carbon constructions, particularly denser ones, absorbed the influence extraordinarily effectively, stopping the particle useless — and crucially, deforming however not shattering.

“We present the fabric can soak up a whole lot of vitality due to this shock compaction mechanism of struts on the nanoscale versus one thing that’s totally dense and monolithic, not nano-architected,” mentioned Portela in a information launch describing the invention. “The identical quantity of mass of our materials could be way more environment friendly at stopping a projectile than the identical quantity of mass of Kevlar.”

Curiously, the researchers discovered they have been in a position to mannequin the influence and harm greatest by utilizing strategies typically used to explain meteors impacting a planet’s floor.

That is simply an preliminary lab consequence, so troopers gained’t be carrying tetrakaidecahedronal flak jackets any time quickly, however the experiment positively exhibits the promise of this method. If the group is ready to discover a option to manufacture the fabric at scale, it might be helpful in every kind of industries.

The examine was revealed within the journal Nature Supplies.

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