Micropolycrystalline diamonds (natural and experimental systems)

The synthetic diamond micropolycrystalline units obtained in N-C-O-Fe system under high concentration in the zone of reaction of the carbon phase with the structure of graphite and a component (metal-catalyst, hydrogen, etc.), facilitating direct transformation of carbon derivatives with layered structure in tetrahedral are investigated. Experiments were conducted on the basis of original schemes of diamond synthesis. The cloven surfaces of artificial polygranular diamonds were close to those in natural Brazilian carbonado.