Solid State Reactions in the Fe - C System under Mechanical Alloying
GENNADY A. DOROFEEV, EUGENE P. YELSUKOV, VLADIMIR M. FOMIN, GENNADY N. KONYGIN AND ANATOLY V. ZAGAINOV
Physical-Technical Institute, Ural Centre of the Russian Academy of Sciences,
Ul. Kirova 132, Izhevsk 426001 (Russia), E-mail: Dorofeev@fnms.fti.udmurtia.su
Pages: 21-26
Abstract
The behaviour of Fe(100 - x)C(x) systems under mechanical alloying (MA) of elemental components within the concentration range up to x = 32 is studied by X-ray diffraction and Mossbauer spectroscopy. At carbon content x < 20 the amorphous phase is observed. At x ≥ 20 the Fe3C and Fe7C3 carbides are formed. For the high-carbon composition Fe(68)C(32) the kinetics of solid state reactions is studied. The amorphous phase, Fe3C cementite and Fe7C3 are formed sequentially in MA process. Solid-state reaction mechanism including the penetration of carbon along the grain boundaries of Fe, the formation of amorphous phase and carbides depending on C content and milling time is discussed.
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