METHOD OF PRODUCING COMPOSITE MATERIALS FROM CUBIC BORON NITRIDE Russian patent published in 2013 - IPC C04B35/5831 

FIELD: chemistry.

SUBSTANCE: invention relates to production of various types of metal-processing tools: cutters, millers, lapping tools, particularly production of sintered composite material made from cubic boron nitride powder. The method involves moulding cubic boron nitride powder and saturating the obtained moulded article with molten binder made from silicon and nickel at pressure of 20-40 kbar and temperature of 1200-1400°C, lying the range of stability of cubic boron nitride of a phase diagram. The amount of saturating material is equal to 10.0-25.0 wt %. The amount of nickel in the alloy with silicon is equal to 50-75 wt %.

EFFECT: using a silicon and nickel alloy enables deeper saturation an article made from cubic boron nitride powder at sufficiently low pressure and obtain a composite material with high heat-resistance, heat-conductivity, wear-resistance and electroconductivity, which enables to use the material for make articles of the required dimensions and shape using simple methods such as electro-erosion machining.

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