Boron carbide (chemical formula approximately b4c) is an extremely hard boron–carbon ceramic, and covalent material used in tank armor, bulletproof vests, engine sabotage powders, as well as numerous industrial applications. with a vickers hardness of >30 gpa, it is one of the hardest known materials, behind cubic boron nitride and diamond. Amazon: boron carbide powder. skip to main content. ... best sellers gift ideas new releases whole foods today's deals amazonbasics coupons gift cards customer service free shipping shopper toolkit registry sell. 1-16 of 108 results for boron carbide powder Best boron carbide powder , find complete details about best boron carbide powder,boron carbide price,best boron carbide powder,boron nitride powder from other metals & metal products supplier or manufacturer-gongyi yalv material co., limited. menu menu alibaba ... 1. boron carbide powder is used to control nuclear fission. 2. boron carbide powder is used in grinding of hard materials, such as milling, drilling and polishing of cemented carbide, 3. boron carbide powder can be as ceramic coating of warships and a helicopter . 4. boron carbide powder can be used for manufacturing guns nozzle in the arms industry. 5.