from the conferences organized by TANGER Ltd.
Fe-Ni-based nanoparticles are promising materials for the production of high-performance permanent magnets. The research explores the preparation of Fe-Ni alloys using iron-nickel oxalate precursors, which were synthesized via the coprecipitation method and subsequently reduced in a hydrogen atmosphere. One of the aims of the work is to compare the effect of different methods of preparation of precursors on the particle size and composition of the resulting materials. Structural, magnetic, and morphological properties were analyzed using a combination of Mössbauer spectroscopy, X-ray powder diffraction (XRD), and scanning electron microscopy (SEM).The relative proportions of iron and nickel content in the prepared oxalate precursors were approximately 50% by weight, according to EDS analysis. The precursor samples consisted of clusters of particles with undefined shapes, exhibiting a wide range of particle sizes. After annealing, multiple Fe-Ni phases were present in the sample. Structure investigation and magnetic measurements confirmed the formation of phases suitable for magnetic applications.
Keywords: Magnetic materials, thermal decomposition, Mössbauer spectroscopy, microscopy© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.