Funct. Mater. 2019; 26 (2): 358-365.
Effect of the carbon nanotubes on mechanochemical synthesis of the Fe-TiC nanocomposite
1Department of Physics, T.Shevchenko University, 4 Glushkov Ave., 03022 Kyiv, Ukraine
2Paton Electric Welding Institute, National Academy of Sciences of Ukraine, 11 Malevich Str., 03680 Kyiv, Ukraine
3V.Bakul Institute for Superhard Materials, National Academy of Sciences of Ukraine, 2 Avtozavodskaya Str., 04074 Kyiv, Ukraine
In this work Fe-TiC (25 wt. %) nanocomposite was manufactured by HP-HT sintering of mechanically alloyed charge of the elemental Fe, Ti and carbon nanotubes. Structural features of the material obtained were characterized by X-ray diffraction and scanning electron microscopy combined with energy-dispersive X-ray spectroscopy at each stage of synthesis. Mechanical alloying of an initial charge in a high energy planetary ball mill leads to the formation of the TiC carbide after 40 min of processing. Milling process was accompanied by a steady decrease of the grain sizes of α-Fe and TiC constituents. Besides, the fine-grained TiC particles were homogenously distributed in the nanocrystalline α-Fe binder matrix providing a sufficiently high (11.3 GPa) Vickers hardness of the cermet.
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