"boron carbide." YourDictionary, n.d. Web. 13 October 2018. <http://www.yourdictionary.com/boron-carbide>.
boron carbide. (n.d.). Retrieved October 13th, 2018, from http://www.yourdictionary.com/boron-carbide
A compound of boron and carbon, especially B4C, an extremely hard, black crystalline compound. It is used as an abrasive, in control rods for nuclear reactors, and as a reinforcing filament in composite structural materials.