boron carbide ceramic
http://boron-carbide.com/b4c-ceramic-bullet-proof-plate/boron-carbide-ceramic-bullet-proof-plate/ Boron Carbide Ceramic - Boron carbide (B4C) is one of the world's hardest manufactured materials. boron carbide plates are a very hard metallic material much harder than steel or iron, second only to diamond. |
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