HEAT-RESISTANT COMPOSITE DIAMOND SINTERED ARTICLE AND THE METHOD OF ITS PRODUCTION Russian patent published in 2007 - IPC C04B35/528 C01B31/06 

FIELD: chemical industry; mining industry; other industries; methods of production of the heat-resistant composite diamond sintered articles.

SUBSTANCE: the invention is pertaining to the heat-resistant composite diamond sintered articles used in the capacity of the cutting tools, the tool used for the high-precision machining and to the jewelry branch. The diamond composite sintered article contains in the capacity of the article the diamond crystal and the very small amount of the non-diamond carbon and has the hardness according to Vickers of 85 GPa or more. The article is produced by the method providing for inclusion of the synthetic diamond powder having the average size of the grains of 200 nanometers or less, in the tantalum or molybdenum capsule, both heating and application of the pressure at usage of the apparatus for the synthesis under the super-high pressure in the thermodynamically stable conditions including the temperature of 2100°С or more and the pressure of 7.7 GPa or more. The technical result of the invention is production of the articles having the electric conductivity, the high thermal stability and having the brilliance and the glaze.

EFFECT: the invention ensures production of the articles having the electric conductivity, the high thermal stability and having the brilliance and the glaze.

6 cl, 4 ex, 3 dwg