Mechanochemical Synthesis of Magnetic Abrasive Media Fe/SiC, Fe/B4C, and Fe/TiC
T. F. GRIGOR’EVA1, S. A. KOVALEVA2, P. A. VITYAZ2, V. I. ZHORNIK2, T. YU. KISELEVA3, S. V. VOSMERIKOV1, and N. Z. LYAKHOV1
1Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
E-mail: grig@solid.nsc.ru
2Joint Institute of Mechanical Engineering, National Academy of Sciences of Belarus, Minsk, Belarus
E-mail: sveta_kovaleva@tut.by
3Lomonosov Moscow State University, Moscow, Russia
Keywords: mechanochemical reactions, powder metallurgy, abrasives, silicon carbide, boron carbide, titanium carbide, magnetic abrasive materials
Pages: 483-487
Abstract
Operating characteristics of mechanochemically synthesized powder materials for magnetic abrasive treatment depend on microstructure and elemental distribution within composite particles. X-ray diffraction, high-resolution electron microscopy, and Mössbauer spectroscopy were used to explore Fe/SiC, Fe/B4C, and Fe/TiC mechanocomposites that can be applied as magnetic abrasive working media. Synthesis of iron/abrasive mechanocomposites was carried out in an AGO-2 high-energy planetary ball mill with water cooling under argon. Silicon carbide inclusions of 0.6–5.0 µm size range are homogeneously distributed in composite Fe/SiC particles of 8–110 µm. There is the inter-phase interaction of iron and B4C abrasive in the Fe–B4C system upon mechanical activation.
Fe/TiC composites were produced by the two-step mechanochemical synthesis. Fine
titanium carbide powders generated in the
first step of synthesis during activation with the formation of the high energy
titanium–carbon system are mechanochemically fused together with iron
powder particles in the second stage. Synthesis of TiC is completed within 4 min of mechanical activation with formation
of particles of 0.1–0.5 µm size. The Fe/TiC composites are formed within
2 min of mechanical activation of titanium (IV) carbide with iron.
DOI: 10.15372/CSD20180505
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