Visible to the public Hybrid magnetic composite (HMC) materials for sensor applications

TitleHybrid magnetic composite (HMC) materials for sensor applications
Publication TypeConference Paper
Year of Publication2016
AuthorsFerraris, L., Franchini, F., Pošković, E.
Conference Name2016 IEEE Sensors Applications Symposium (SAS)
Date PublishedApril 2016
ISBN Number978-1-4799-7250-0
Keywordsbonded magnets, coercive force, coercivity, composability, composite materials, compositionality, cyber physical systems, electric guitar, electromagnetic sensor, encoder wheel, epoxy resin, Ferrites, hard magnetic material, HMC material, hybrid magnetic composite material, hybrid magnets, induction remanence characteristics, Iron, magnetic characteristic, Magnetic flux, magnetic particles, magnetic permeability, magnetic permeability measurement, magnetic pickup, magnetic powder composition, Magnetic Remanence, magnetic sensors, metal powder, NdFeB, phenolic resin, plastic binder, plastics, pubcrawl, remanence, Resiliency, sensor application, SMC, soft magnetic material, Soft magnetic materials, Wheels

Several applications adopt electromagnetic sensors, that base their principle on the presence of magnets realized with specific magnetic materials that show a rather high remanence, but low coercivity. This work concerns the production, analysis and characterization of hybrid composite materials, with the use of metal powders, which aim to reach those specific properties. In order to obtain the best coercivity and remanence characteristics various "recipes" have been used with different percentages of soft and hard magnetic materials, bonded together by a plastic binder. The goal was to find out the interdependence between the magnetic powder composition and the characteristics of the final material. Soft magnetic material (special Fe powder) has been used to obtain a low coercivity value, while hard materials were primarily used for maintaining a good induction remanence; by increasing the soft proportion a higher magnetic permeability has been also obtained. All the selected materials have been characterized and then tested; in order to verify the validity of the proposed materials two practical tests have been performed. Special magnets have been realized for a comparison with original ones (AlNiCo and ferrite) for two experimental cases: the first is consisting in an encoder realized through a toothed wheel, the second regards the special system used for the electric guitars.

Citation Keyferraris_hybrid_2016