SiC dispersed Fe-based glassy composite cores produced by spark plasma sintering and their high frequency magnetic properties

Structural and Magnetic Characteristics of Composite Compacts of <inline-formula> <tex-math notation="TeX">${\rm Fe}/{\rm Fe}_{3}{\rm O}_{4}$ </tex-math></inline-formula> Type Obtained by Sintering

“…All the compacts are not suitable for the use at frequencies that exceed 500 Hz. This is due to the excessive increase in the eddy currents at higher frequencies [2]- [4]. This currents lead to the exponential increase in the total losses and in the same time to the important drop of the magnetic permeability.…”

“…To obtain soft magnetic composite compacts two routes are usually used: 1) the soft magnetic particles are coated by a thin layer of resin/adhesive/polymer and then compacted without sintering [1]- [5] and 2) the soft magnetic particles are mixed/milled with ceramic materials and then sintered [2], [6], [7]. In both cases, the role of the second phases is devoted to increase the electrical resistivity.…”

“…This will lead to the limitation of the eddy current losses in wide frequency applications [2]- [4]. A large range of soft magnetic composites were synthesized, but a special attention was given to the Fe-based composite compacts, such as: Fe 79.3 Si 5.7 B 13.3 C 1.7 -resin [1], Fe 73 Si 7 B 17 Nb 3 -SiC [2], iron-resin [3], Mg-ferrite/Fe-Ni [6], etc. The soft magnetic powder used for the synthesis of soft magnetic composites compacts can be milled for a very well homogenization, for composite powder obtaining, as well as for powder activation, etc.…”

Fabrication and Mechanical Behavior of Ex Situ Mg-Based Bulk Metallic Glass Matrix Composite Reinforced with Electroless Cu-Coated SiC Particles

“…For lightweight reinforcements, typical ceramic SiC particles, which are widely used in conventional metal matrix composites, have also been introduced in BMGMCs [ 19 , 20 , 21 , 22 , 23 , 24 ]. Unfortunately, it is a major challenge to use SiC as an effective reinforcement.…”

“…Such interactions will, in turn, cause some unique metallurgical phenomena, such as wetting and interfacial reactions, which are essential for the preparation of composite materials. In order to improve the wettability and improve the uniformity of the dispersion of SiC particles in the matrix, many expensive devices that require high energy consumption have been used, such as vacuum hot sintering [ 22 ] and spark plasma sintering [ 23 , 24 ]; processes that are obviously not conducive to reducing the cost of material preparation. The development of inexpensive methods or simple technologies for the fabrication of SiC composite materials become a new challenge in the field of BMGMCs.…”