Developing effective ways formed of structure and properties of hard metal composites modified by nanoparticles

New data about infl uence of ceramic nanoparticles additives on the hard metals WC-Co properties are received. Complex investigation of hard metal using suggested conventional mechanic testing methods combined with metallography, electron microscopy and x-ray phase analysis enabled to establish stable correlating links between volume content of nanoparticles whith average sizes of carbide and micro structure parameters and strength of hard metals. Nanoparticles introduced into a binder size decrease of the metal interlayer and therefore increase the strength of binder and composite as a whole. The reduction of the carbide grain average size was found out as well (owing to nanoparticles blocking influence on recrystallization). The test results display that the modification thought nanoparticles enables to improve the main final physical and mechanical properties of hard metals properties: hardness, fracture toughness, transverse rupture toughness, elastic modulus, wear resistance.