Influence of structural state of carbon on formation of mechanocomposites Cu-C

Special features of the solid-phase transformations of the composites Cu-fullerite and Cu-graphite in process of their mechanoactivation (MA) and further heating have been studied. It was stated that the form of carbon (fullerite, C60/70; graphite, Cg) and its structural state in the composition of mechanocomposites Cu-С60/70 and Cu-Cg cause a dramatic effect on the oxidation of Cu. At the initial stage of mechanosynthesis (MS) (up to 2 h) copper oxide Cu2O was formed in the Cu-С60/70 mixture. The reduction of this oxide was only possible upon the destruction of fullerene molecules, the necessary condition for which was the increase of mechanosynthesis time (more than 4 h) and heating in the range of 230-330 °С. No copper oxide was formed in the case of Cu-Cg.