Aluminium oxynitride is a ceramic composed of aluminium, oxygen & nitrogen. It's optically transparent & four times harder than fused silica glass, 85% as hard as sapphire. ALON-based armor can stop multiple armor-piercing projectiles of up to .50 BMG cal
Aluminum is an infinitely recyclable material: it takes 95% less energy to recycle it than to produce primary aluminum
Today, ~75% of all aluminum produced in history, a billion tons, is still in use
This is how cans are recycled in Japan
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