Сarbon-like units for a nanosized tool based on the use of boron nitride and diamond

Abstract

Phase transformations of pyrolytic boron nitride were studied under thermo-baric conditions, providing direct transformation of a hexagonal structure into a cubic one. If only the martensitic mechanism of the cooperative rearrangement of atoms is realized, diamond-like aggregates with an equiaxed highly dispersed structure and submicron grain sizes are formed. The presence of a solvent-catalyst (RC) in the system leads to an increase in the particle size of the cubic phase due to recrystallization by the diffusion mechanism, and the high catalytic activity of RC causes the appearance of zones of directional crystal growth in the synthesized samples.