The Formation and Study of the FeCo Nanoparticles Alloy in Structure of Metal-Carbon Nanocomposites FeCo/C

Authors	L.V. Kozhitov¹ , M.F. Bulatov², V.V. Korovushkin¹ , V.G. Kostishin¹ , D.G. Muratov¹^,³, M.N. Shipko¹^,⁴, S.G. Emelyanov⁵, E.V. Yakushko¹
Affiliations	¹ National University of Science and Technology «MISiS», 4, Leninsky Pr., 119049 Moscow, Russia ² JSC "State research and design Institute of rare-metal industry "Giredmet", 5-1, G. Tolmachevsky Lane, 119017 Moscow, Russia ³ A.V. Topchiev Institute of Petrochemical Synthesis, RAS, 29, Leninsky Pr., 119991 Moscow, Russia ⁴ Russian University of Economics named after G. V. Plekhanov, 117997 Moscow, Russia ⁵ South-West State University, 94, 50 let Oktyabrya St., 305040 Kursk, Russia;
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Issue	Volume 7, Year 2015, Number 4
Dates	Received 02 November 2015; published online 24 December 2015
Citation	L.V. Kozhitov, M.F. Bulatov, V.V. Korovushkin, et al., J. Nano- Electron. Phys. 7 No 4, 04103 (2015)
DOI
PACS Number(s)	76.80. + y, 81.05.Mh, 78.67.Bf
Keywords	Mossbauer spectroscopy (3) , Metal-carbon nanocomposites (6) , FeCo Nanoparticles, XRF-analysis, IR-heating (3) .
Annotation	The features the phase transitions and phase composition of the metal-carbon nanocomposites FeCo / C were studied by Mossbauer spectroscopy. Nanocomposites were synthesized in the temperature range of T = 300-800 °C. It was shown that the samples synthesized at T = 300 °C contains of superparamagnetic nanoparticles of magnetite and amorphous oxide of iron only. The process of forming nanoparticles of alloy FeCo occurs within the temperature range 500-600 ° C due to the recovery of amorphous iron oxide and magnetite as well as them dissolving in a phase of cobalt. The growth of size of nanoparticles of alloy by agglomeration and dissolution of iron in the alloy nanoparticles occurs only at the temperature range of synthesis 600-800 ° C. This is confirmed by a decrease of the content of Fe, which associated with carbon and it is consistent with the results of phase and structural studies, carried out in previous works.
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