Advanced Powder Technology, Vol.30, No.8, 1724-1728, 2019
Structural changes of fullerite C-60/70 during mechanosynthesis of copper and iron based composites
The structural changes of fullerite C-60/70 during mechanosynthesis of composites Me-25 at%C-60/70 (Me = Cu, Fe) have been studied by X-ray diffraction analysis and Raman spectroscopy. It is found that depending on the milling time and carbon affinity for metal, partial or complete disordering of the fullerite C-60/70 crystalline structure and destruction of fullerene molecules take place. Their deformation stability determines the sequence of solid-phase reactions in the investigated systems. The local atomic environment in the Fe-C-60/70 has been studied by Moessbauer spectroscopy. It is shown that the mechanism of the phase formation in the Fe-C-60/70 is as follows: the Fe3C carbide is crystallized from an amorphous phase Am(Fe-C). (C) 2019 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.