METHOD OF PRODUCING SUPER HARD COMPOSITE MATERIAL Russian patent published in 2015 - IPC C01B31/06 B82B3/00 B82Y40/00 

FIELD: process engineering.

SUBSTANCE: initial mix is prepared to contain the following components in wt %: fullerite C₆₀ and/or C₇₀ - 30-70; boron with grain size of up to 2 mcm - 70-30. At first step, produced mix is processed in gasostat in inert gas at 50-120 MPa and 1500-1850°C with subsequent holding for 15-180 minutes. Then, temperature is decreased to the room temperature while pressure is decreased to barometric pressure. At second step, pressure of at least 7 GPa and temperature of at least 1400°C are applied for at least one minute. Then, temperature is decreased to the room temperature while pressure is decreased to barometric pressure. Produced material features modulus of elasticity of 390-460 GPa, bulk modulus of 210-380 GPa, shear modulus of 170-180 GPa and hardness of 42-90 GPa. It represents a homogeneous high-dispersion matrix of boron carbide diamonds uniformly distributed therein, sized to about 1 mcm and actual density of at least 98% of theoretical magnitude.

EFFECT: production of high-pressure hardware, high wear-resistance materials, cutting and drilling tools.

2 cl, 4 dwg, 3 ex