TY - JOUR T2 - Journal of Mining and Metallurgy, Section B: Metallurgy TI - Mechanical alloying of iron-coated NbC and Si in stirred media mill VL - 55 IS - 2 SP - 209 EP - 216 PY - 2019 DO - 10.2298/JMMB181124016A AU - A. Al-Azzawi AU - F. Kristály AU - Á. Rácz AU - P. Baumli AU - K. Bohács AU - G. Mucsi AD - a University of Miskolc, Institute of Physical Metallurgy, Metal Forming and Nanotechnology, Miskolc, Hungary b University of Miskolc, Institute of Raw Material Preparation and Environmental Processing, Miskolc, Hungary c University of Miskolc, Institute of Mineralogy and Geology, Miskolc, Hungary AB - In the current research, the effect of mechanical alloying (MA) of iron-coated NbC and Si on the material’s fineness and crystal structure was investigated. The MA experiments were carried out in a batch-type laboratory scale stirred media mill for various residence times up to 240 min in isopropanol. During MA, milling energy was measured, and stress energy (SE) was calculated. Morphology and material structural changes, during the mechanical alloying process, were determined by means of scanning electron microscopy (SEM) and powder X-ray diffraction (XRD), respectively. The particle size distribution of the product was measured by a Horiba 950 LA laser particle size analyser. Evolution of phases during highenergy milling of NbC, Al-Fe-carbide, Fe, and Si was studied as a function of specific milling energy. Transformations in the crystal structure were revealed, namely the generation of cementite and Nb-Si-carbide, which was proved by XRD results and thermodynamic calculations. As result of the experiments, optimum MA conditions were determined. The application of the mechanical alloying method gives the opportunity to produce nanocrystalline phase from the initial ironcoated NbC and Si powder. KW - Niobium carbide KW - Silicon KW - Mechanical alloying KW - Nanostructure KW - Phase composition N1 - Correspondence Address: A. Al-Azzawi, University of Miskolc, Institute of Physical Metallurgy, Metal Forming and Nanotechnology, Miskolc, Hungary email: femali@uni-miskolc.hu N1 - J. Min. Metall. Sect. B-Metall. 55 (2) B (2019) 209-216. DOI:10.2298/JMMB181124016A PB - Technical Faculty in Bor SN - 14505339 (ISSN) LA - English J2 - J. Min. Metall. Sect. B Metall. M3 - Article ER