cubic boron nitride

   Cubic boron nitride, with a molecular formula of BN, has a crystal structure (Figure 1) similar to diamond, with a slightly lower hardness than diamond and HV72000 to 98000 MPa, often used as abrasive and tool materials. In 1957, R.H. vintov America first developed into cubic boron nitride. In 2013, nanocrystalline cubic boron nitride was successfully synthesized by Yanshan University. The new material has many excellent properties, its hardness exceeds the diamond single crystal, the toughness is better than the commercial hard alloy, the oxidation temperature is higher than the cubic boron nitride single crystal itself. It is expected to be a new generation tool material in the steel material processing industry. It has a broad application prospect.