METHOD OF OBTAINING SUPERHARD NANO-STRUCTURED MATERIAL FROM BOHR'S NITRIDE

摘要

1. A method for producing a nanostructured superhard diamond-like forms of matter from boron nitride, comprising preparing mixtures of powders and sphalerite wurtzite modifications, molding and sintering them at high pressures, temperatures and exposure times determined partial transition conditions for wurtzite-form boron nitride to cubic without rekristallizatsii.2. A method according to claim 1, characterized in that, in order to obtain a material with high abrasion and impact resistance, are used polycrystalline powders sphalerite modification ultrafine zernom.3. A method according to claim 1, characterized in that the powder obtained by crushing sphalerite modification polycrystalline compacts synthesized at thermobaric treatment pyrolytic bora.4 nitride. A method according to claim 1, characterized in that the polycrystalline powders sphalerite modification is taken from the range 10-50 microns and the grain sizes therein do not exceed 0.5 mkm.5. A method according to claim 1, characterized in that the mixture of sphalerite and wurtzite modification prepared in ratios from 4: 1 to 2: 3 sootvetstvenno.6. A method according to claim 1, characterized in that the pressure parameters selected from the range of 6.5-8.5 GPa and the sintering temperature was selected from the range of 1500-1800 ° C.7. A method according to claim 1, characterized in that the holding time at the sintering temperature is from 20 to 60 seconds to achieve full density and compact partial preservation of wurtzite phase.