期刊
SURFACE & COATINGS TECHNOLOGY
卷 270, 期 -, 页码 66-76出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2015.02.054
关键词
Soft magnetic composite; NiFe2O4 spinel ferrite; Coating; Precipitation method; Focused ion beam
资金
- Operational Program Research and Development [ITMS 26220220186]
- project CEITEC-Central European Institute of Technology, European Regional Development Fund [CZ.1.05/1.1.00/02.0068]
- Slovak Academy of Sciences [VEGA 1/0861/12, 2/0155/12, APVV SK-CZ-2013-0150]
- Czech Science Foundation [14-25246S]
- Scientific Grant Agency of Ministry of Education of Slovak Republic
Soft magnetic core-shell particles were designed by coating FeSi and permalloy powders with ferrite nanoparticles. The permalloy-type powder particles were prepared by mechanical alloying process of 80 wt% of Ni, 14.7 wt% of Fe, 4.4 wt% of Mo, 0.5 wt% of Mn and 0.3 wt% Si. NiFe2O4 cuboidal nanoparticles were synthesized by the chemical precipitation of hydroxides by alkaline treatment of the dissolved metal in aqueous chloride solution and the same process was used for a deposition of NiFe2O4 nanoparticles on both substrates. The average size of NiFe2O4 nanoparticles, crystallinity and spinet structure were determined by TEM and XRD techniques. The deposited coating was created in a bilayer form. The composition of individual layer was analyzed by XRD and TEM using 100-nm lamella extracted from the coating by focused ion beam. The chemical composition of individual layers was analyzed by EDX analysis. The specific electric resistivity measurement has confirmed a good insulating character of the designed bilayer coating, whereas the prepared core-shell powders and relevant green compacts belong to soft magnetic materials. (C) 2015 Elsevier B.V. All rights reserved.
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