Power loss separation in Fe-based composite materials

The frequency dependence of total losses measured in the frequency range from dc to 1kHz of two Fe-based soft magnetic composites (prepared by compaction of an ASC 100.29 iron powder mixture with 10vol% of commercial thermoset resin and of a Somaloy® 700 powder) was analyzed. We found out that hyste...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2013-02, Vol.327, p.146-150
Main Authors: KOLLAR, Peter, BIRCAKOVA, Zuzana, FÜZER, Ján, BURES, Radovan, FABEROVA, Mária
Format: Article
Language:English
Subjects:
Composite
Composite materials
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electrical resistivity
Exact sciences and technology
Fe and its alloys
Frequency ranges
Iron
Magnetic properties and materials
Magnetic property
Magnetism
Particulate composites
Physics
Polymers
Powder consolidation
Power loss
Resins
Soft magnetic material
Studies of specific magnetic materials
Thermosetting resins
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Summary:The frequency dependence of total losses measured in the frequency range from dc to 1kHz of two Fe-based soft magnetic composites (prepared by compaction of an ASC 100.29 iron powder mixture with 10vol% of commercial thermoset resin and of a Somaloy® 700 powder) was analyzed. We found out that hysteresis losses (per volume unit) are higher for the composite with lower volume concentration of iron particles (i.e. mixture of iron with resin) and consequently weaker magnetic interaction between particles. On the other hand, higher specific resistivity of the sample with lower magnetic fraction causes lower contribution of eddy current losses to the total losses. A linear dependence of the total energy losses on frequency was observed and from them the contribution of excess losses was obtained. The detailed study of the excess losses resulted in an explanation of the frequency dependence of these losses in composite materials. ► It was observed that excess losses in SMC depend on the frequency linearly. ► Two components of eddy current losses (inter- and intra-particle) were analyzed. ► Larger amount of insulator causes the eddy current inside ferromagnetic particles.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2012.09.055