Effect of deuterium on phase transformations in a mixture of amorphous-like fullerenes С60/C70(50/50) at high temperature and pressure

Abstract Using neutron diffraction, Raman spectroscopy and HRTEM, we studied the effect of low deuterium concentrations (~2 at.%) on phase transformations at high temperatures (up to 1100 °C) and high pressure (8 GPa) of a mixture of amorphous C60/C70 fullerenes (50/50) and on the nanostructure, anisotropy and distortions of the amorphous-like graphite that forms at 800 °C from this mixture. It was also shown that deuterium contributes to the transformation of the mixture of amorphous-like fullerenes into amorphous-like and nanocrystalline graphite. It significantly changes the structure of the formed amorphous-like graphite, preventing the formation of graphite nanoclusters in it, reducing the distortion inherited from the mixture of amorphous-like fullerenes and changing the degree of anisotropy of this amorphous-like phase.