Soft Magnetic Materials on the Base of Crystalline and Nanocrystalline Iron Powders

摘要

Conditions of preparation of composite iron-based crystalline and nanocrystalline powders wereinvestigated, and flow diagrams of the manufacture of soft magnetic materials and prototypes ofproducts from them were developed.The influence of the type and composition of cladding inorganic and polymeric additives on theformation of the structure, magnetic, and mechanical properties of the developed materials wasstudied.The most efficient types of cladding additives and their optimal contents that provide the preparationof soft magnetic composite materials and prototypes of magnetic cores with the best combination ofmagnetic and physicomechanical properties from them were determined.In the work, results of an investigation of SMCs obtained by cladding of iron powder using chemicalmethod with the aim of depositing organic components on the initial particles of the surface arepresented.Lower values of magnetic losses can be obtained when iron powder particles are clad by thininterlayers of organic component.The cladding of the initial iron powders provides isotropic magnetic properties, decreases inmagnetic losses due to increases in the electric resistivity.The developed materials are recommended for the manufacture of magnetic cores operating in d-cand a-c fields of extended range.