Cubic boron nitride (CBN) is a new type of superhard material, which is synthesized artificially and has the hardness second only to diamond. It uses hexagonal boron nitride as raw material and through the action of catalyst, transforms hexagonal boron ni

The structure of CBN is the same as that of diamond, which is composed of two face centered cubic lattices staggered by 1 / 4 length along the cube diagonal.