SINTERED DIAMOND OBJECT WITH HIGH STRENGTH AND HIGH WEARING RESISTANCE AND METHOD OF MAKING IT Russian patent published in 2009 - IPC C01B31/06 C04B35/52 

FIELD: chemistry.

SUBSTANCE: present invention can be used in making a cutting and a machining tool and electrodes. The sintered diamond object with high strength and high wearing resistance contains 80-98 vol.% particles of sintered diamond, with average size of not more than 2 mcm, and a phase of binding substance, containing 50-99.5 wt % cobalt and 0.5-50 wt % of at least one element, chosen from a group comprising Ti, Zr, Hf, V, Nb, Ta, Cr, Mo. Part of the element or weight of the element is in form of carbide particles, with average size of not more than 0.8 mcm. The texture of carbide particles is non-continuous, and adjacent diamond particles are bonded together. Sintering is carried out at 5.7-7.5 GPa pressure and 1400-1900°C temperature in a "belt" type super-high pressure device.

EFFECT: provision of transverse breaking strength of not less than 2,65 GPa, excellent wearing resistance, resistance to shearing, shock resistance and thermal conductivity.

7 cl, 6 tbl, 5 dwg, 6 ex