Boron carbide machining & grinding. boron carbide can be machined in green, biscuit, or fully dense states. while in the green or biscuit form it can be machined relatively easily into complex geometries. however, the sintering process that is required to fully densify the material causes the boron carbide body to shrink approximately 20%. China boron carbide ceramic manufacturersselect 2020 high quality boron carbide ceramic products in best price from certified chinese resistance ceramic manufacturers, ceramic tube suppliers, wholesalers and factory on made-in-china Boron carbide (b 4 c) is one of a number of boron/carbon compounds, but is the one most frequently used as a ceramic material. it is perhaps the hardest of materials which can be processed as a conventional ceramic, and its applications are concentrated where hardness is the principal requirement, including grit blasting nozzles, bearings, light-weight ballistic armor, etc. There are 574 suppliers who sells boron nitride tube on alibaba, mainly located in asia. the top countries of supplier is china, from which the percentage of boron nitride tube supply is 100% respectively. boron nitride tube products are most popular in south korea, united states, and united kingdom.