摘要
Materials that possess Vickers hardness(Hv)higher than 40 GPa are known as superhard materials,which have important applications in industry and scientific research.Commercially,there are only two types of superhard materials,i.e.diamond and cubic boron nitride(c-BN),which are widely used as cutting,polishing,drilling and coating materials.Although diamond has unrivaled hardness of 60–120 GPa,its applications in some circumstances,such as cutting ferrous materials,are limited due to poor
Materials that possess Vickers hardness （Hv） higher than 40 GPa are known as superhard materials, which have important applications in industry and scientific research. Commercially, there are only two types of superhard materials, i.e. diamond and cubic boron nitride （c-BN）, which are widely used as cutting, polishing, drilling and coating materials.
