FIELD: superhard materials.
SUBSTANCE: invention relates to superhard elements from diamond or diamond-like material, in particular to polycrystalline diamond elements. The latter are used to squeezing tools, indenters, toll fixtures, and friction elements. Polycrystalline diamond element includes multiple partially joined with each other diamond or diamond-like crystals forming at least one continuous diamond matrix and intercrystallite zone located between diamond crystals, which forms at least one continuous intercrystallite matrix containing catalytic metal. Part of intercrystallite matrix disposed in immediate vicinity from working surface is essentially free of catalytic material and forms space, which extends deeper from working surface by at least 0.1 mm. Content of remaining catalytic material in this space continuously falls as approaching working surface.
EFFECT: increased wear resistance in cutting operations and increased heat transfer when using the elements as radiators.
13 cl, 24 dwg
