Features of Mechanical Alloying in Fe-B System
EUGENE P. ELSUKOV, ALEXANDER L. UL'YANOV and GENNADIY A. DOROFEEV
Physical and Technical Institute, Ural Branch of the Russian Academy of Sciences,
Ul. Kirova 132, Izhevsk 426001 (Russia), E-mail: Yelsukov@fnms.fti.udm.ru
Pages: 155-164
Abstract
The sequence and kinetics of solid-phase reactions that take place during mechanical alloying of the mixtures of Fe and B powders with the atomic ratios Fe(68)B(32) and Fe(85)B(15) were investigated by means of Mössbauer spectroscopy and X-ray diffraction. It was established that the initial stage of mechanical alloying includes the formation of nanostructural state in a-Fe particles and the formation of the Fe-B amorphous phase with the atomic fraction of boron up to 20 %. For other conditions being kept constant, a substantial difference in the kinetics of the initial stage in Fe-B and Fe-C systems was discovered. On the basis of indirect experimental data, it is assumed that the kinetics of the stage under consideration is determined by the size of B and C atoms.
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