DIAMOND POLYCRYSTALLINE COMPOSITE MATERIAL WITH REINFORCING DIAMOND COMPONENT Russian patent published in 2015 - IPC C04B35/528 B24D3/04 

FIELD: chemistry.

SUBSTANCE: invention relates to diamond-based composite materials, obtained by sintering diamond grains and metals with dispersion-strengthening additives and reinforcing CVD diamond component in form of insert, modified under conditions of high pressure and temperature, and can be used for production of drilling and dressing tools. Diamond semi-crystalline composite material with dispersion-strengthening additive contains refractory shell, in which powders of diamond, metal and CVD diamond insert are placed. Shell is made of refractory metal, mainly tantalum and niobium. Nickel, cobalt are used as metals, and tungsten carbide nanopowder is used as dispersion-strengthening additive with the following component ratio, wt %: diamond powder and CVD diamond insert 85-90, nickel 7-9, cobalt 2-4, tungsten carbide nanopowder 0.1-3.0.

EFFECT: increase of hardness and wear-resistance of reinforced with CVD diamond sintered composite and reliable fixation of material in drilling instrument.

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