Abstract
Binderless nano-polycrystalline diamond synthesized by direct conversion of graphite under high pressure and high temperature has a very fine texture consisting of small diamond grains of several tens of nanometers, having extremely high hardness, no cleavage and high thermal stability. Precision cutting tests on various cemented carbides were performed under different conditions. The results revealed that the cutting performance of binderless nano-polycrystalline diamond tool is much higher than those of conventional polycrystalline diamond tool and single-crystal diamond tool. The reasons of its high cutting performance are discussed based on the wear mode and the material properties.
