Preparation of Fe3Si/Ferrite Micro- and Nano-Powder Composite
Composite material based on Fe3Si micro-particles and Mn-Zn nano-ferrite was prepared using powder metallurgy technology. The sol-gel followed by autocombustion process was used for synthesis of Mn0.8Zn0.2Fe2O4 ferrite. 3 wt.% of mechanically milled ferrite was mixed with Fe3Si powder alloy. Mixed micro-nano powder system was homogenized by the Resonant Acoustic Mixing using ResodynLabRAM Mixer. This non-invasive homogenization technique was used to preserve spherical morphology of Fe3Si powder particles. Uniaxial cold pressing in the closed die at pressure 600 MPa was applied to obtain a compact sample. Microwave sintering of green compact was realized at 800°C, 20 minutes, in air. Density of the powders and composite was measured by Hepycnometry. Impulse excitation method was used to measure elastic properties of sintered composite. Mechanical properties were evaluated by measurement of transverse rupture strength (TRS) and Vickers hardness (HV). Resistivity was measured by 4 point probe method. Ferrite phase distribution in volume of the composite was documented by metallographic analysis. It has been found that nano-ferrite particle distributed among micro- particles of Fe3Si powder alloy led to high relative density (~93%) and suitable mechanical properties (TRS >100 MPa, HV ~1GPa, E-modulus ~140 GPa) of the composite. High electric resistivity (R~6.7 ohm.cm) of prepared composite indicate their potential application as soft magnetic material at medium and high frequencies.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1099656Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 3293
 H. Shokrollahi, K. Janghorban, “Soft magnetic composite materials (SMCs)”, J Mat. Processing Technology, vol. 189, pp. 1–12, 2007, doi:10.1016/j.jmatprotec.2007.02.034.
 D. S. Mathew, R-S. Juang, “An overview of the structure and magnetism of spinel ferrite nanoparticles and their synthesis in microemulsions”, Chemical Eng. J., vol. 129, pp. 51–65, 2007, doi:10.1016/j.cej.2006.11.001.
 M. Wang, Z. Zan, N. Deng, Z. Zhao, “Preparation of pure iron/Ni–Zn ferrite high strength soft magnetic composite by spark plasma sintering”, J Magn. Magn. Mat., vol. 361, pp. 166–169, 2014, http://dx.doi.org/10.1016/j.jmmm.2014.02.055.
 M. Anhalt, “Systematic investigation of particle size dependence of magnetic properties in soft magnetic composites”, J. Magn. Magn. Mat., vol. 320, pp. e366–e369, 2008, doi:10.1016/j.jmmm.2008.02.072.
 M. Anhalt, B. Weidenfeller, “Magnetic properties of hybrid-soft magnetic composites”, Mat. Sci. Eng. B, vol. 162,pp. 64–67, 2009, doi:10.1016/j.mseb.2009.02.005.
 Y. Pittini-Yamada, E. A. Perigo, Y. de Hazan, S. Nakahara, “Permeability of hybrid soft magnetic composites”, Acta Materialia, vol. 59, pp. 4291–4302, 2011, doi:10.1016/j.actamat.2011.03.053.
 R. Bures, et al., Structure and Properties of Composites Based on Mixed Morphology of Ferromagnetic Particles, Acta Phys. Pol. A, vol. 126, pp. 140-141, 2014, DOI: 10.12693/APhysPolA.126.140.
 Höganäs Sweden Datasheet Fe3Si 150, http://www.hoganas.com/en/ business-areas/soft-magnetic-composites.
 T. Tanaka, “Young's and Shear Moduli, Hardness and Bending Strength of Polycrystalline Mn-Zn Ferrites“, Japan J. Applied Physics, vol. 14, pp. 1897-1901, 1975.
 Y. Matsuo et al., “Magnetic Properties and Mechanical Strength of MnZn Ferrite“, IEEE Trans Magn, vol. 37, pp. 2369-2372, 2001.
 M.A. Ahmed, et al., “The Influence of Zn2+ Ions Substitution on the Microstructure and Transport Properties of Mn-Zn Nanoferrites“, Mat. Sci. Applications, vol. 5, pp. 932-942, 2014, http://dx.doi.org/10.4236/ msa.2014.513095.
 M. R. Syue, F. J. Wei, Ch. S. Chou, Ch. M. Fu, Magnetic, dielectric, and complex impedance properties of nanocrystalline Mn–Zn ferrites prepared by novel combustion method, Thin Solid Films, vol. 519, pp. 8303–8306, 2011, http://dx.doi.org/10.1016/j.tsf.2011.04.003.
 M. Strečková, et al., “A comprehensive study of soft magnetic materials based on FeSi spheres and polymeric resin modified by silica nanorods”, Mat. Chem. Physics, vol. 147, pp. 649-e660, 2014, http://dx.doi.org/10.1016/j.matchemphys.2014.06.004.
 J. A. de Castro, et al., “Modeling the Densification of FeSi Sintered Magnetic Alloys”, Mat. Sci. Forum, vols. 727-728, pp 175-180, 2012, doi:10.4028/www.scientific.net/MSF.727-728.175