How can it be amor-piercing and turn in to fine dust on impact?
How can it be amor-piercing and turn in to fine dust on impact?
Once the projectile penetrates the armour it sprays out aa a jet of hot metal and solidifies as dust. (Depleted uranium also burns at high temperatures, so the liquified projectile is also on fire).
Penetration depth (hydrodynamic penetration) is a function of the relative density of the liquids and the length of the projectile, which is why DU is favoured.
Also, most materials will burn at a high enough temperature. DU dust is pyrophoric: it will spontaneously catch on fire at room temperature.
https://www.youtube.com/watch?v=9W_nMRbIlZI
I wouldn't really know how to verify this guys facts, but there doesn't seem to be anyone in the comments claiming he's massively wrong.