Formation of diamond-like aggregates from boron nitride obtained by direct transition

Abstract

The phase transformations of pyrolytic boron nitride have been studied under thermobaric conditions providing a direct transformation of the hexagonal structure into a cubic one. In the case of the implementation of only the martensitic mechanismof cooperative rearrangement of atoms, diamond-like aggregates with an equiaxed highly dispersed structure and submicron grain sizes are formed.