Polycrystalline diamond layer and tungsten carbide substrate consisting of

Polycrystalline diamond layer and a cemented carbide substrate consisting of; a micron diamond particles and the binder powders were uniformly mixed, static pressure, high  abrasive grinding  (HPHT) method, the powder sintered substrate made ​​of cemented carbide a composite material, shown in Figure 1. PDC as a new superhard composite products, has  synthetic diamond  used in many fields; particularly in the oil drilling, due to the particularity of usage of PDC put forward higher  Diamond blade  for quality. PDC is at high pressure, high temperature prepared from. Theoretically hope polycrystalline diamond layer is completely densified, but the actual production process, the total unavoidable defects in the diamond layer.