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Army Again Turns to Depleted Uranium for New Weaponry


Nyrath

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http://www.wired.com/dangerroom/2009/12/army-again-turns-to-depleted-uranium-for-new-weaponry/

 

Kinetic rounds are metal slim darts fired from tanks like the MAA1 Abrams at very high velocity. The preference for DU is not based, as some conspiracy theorists would have it, on a diabolical scheme to dump nuclear waste in developing countries. It’s because in addition to its high hardness and density, it has a property called adiabatic shear banding. Essentially, DU is crumbly rather than squishy. During the process of high-speed penetration through metal armor, fragments flake off a DU projectile. This means that a DU projectile is “self sharpening” (compared to tungsten, which tends to deform in a “blunted,” mushroom shape.) It also means that DU produces a pyrophoric effect, filling the vehicle hit with a lethal fireball of tiny burning particles. That too makes it more effective than tungsten.

 

For many years, the Pentagon has been researching alternatives to DU, most notably Darpa’s “Liquidmetal” initiative on amorphous tungsten. This is a “glassy metal” without a crystalline structure which is very hard and shows the right kind of behavior under extreme stress. However, there still appear to be difficulties with producing large amorphous tungsten penetrators.

 

Self sharpening pyrophoric FTW!

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