Jun 12, 2018u00a0u00b7 with a vickers hardness of >30 gpa, it is one of the hardest known materials, behind cubic boron nitride and diamond. on the basis of product type, the global boron carbide market can be divided into several sectionsluding powder, grains and paste. and powder segement dominates the market and is estimated to hold a 57% market share. Boron carbide dazzles on the pyrotechnics landscape pyrolytic boron nitride replacing quartz crystal 4. technology developmentsa glance at past innovations recent advancementssynthesis of 2d hexagonal boron nitride hexagonal boron nitridepotential substrate for graphene devices with high heat dissipation Products such as pure silicon are made via the lely process, in which the carbon powder is sublimated in argon and then redeposited. types. examples of different types of carbides include boron carbide, silicon carbide, and tungsten carbide (wc). boron carbide (b 4 c) has higher hardness than alumina Boron carbide is one of the hardest materials known, ranking third behind diamond and cubic boron nitride. boron carbide powder is mainly produced by reacting carbon with b2o3 in an electric arc furnace, through carbothermal reduction or by gas phase reactions.