synthetic diamonds 7 синтетические алмазы 7 синтетичні алмази 7 drill bits 4 wear resistance 4 буровые коронки 4 бурові коронки 4 зносостійкість 4 износостойкость 4 The physicomechanical characteristics 1 a specific magnetic susceptibility 1 an ultimate load at static compression of grains 1 character of wear 1 destruction 1 diamond-bearing composite matrix 1 drill bit 1 energy intensity of destruction 1 energy intensity of rock destruction 1 magnetic properties 1 micro fracture 1 rock cuttings 1 rock destruction efficiency 1 rock-breaking insert 1 roughness of the face microfilm 1 shape similarity of grain projection 1 the specific magnetic characteristic 1 thermal strength 1 thermostability 1 uniformity on strength 1 wear mechanism 1