About
9
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147
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Introduction
Tomaž Tomše works at the Department for Nanostructured Materials, Jožef Stefan Institute, Ljubljana, Slovenia. Tomaž does research in Materials Science and Materials Chemistry, focusing on processing and characterization of Nd-Fe-B-type permanent magnets. His most recent publication is 'Multicomponent permanent magnets for enhanced electrical device efficiency.'
Publications
Publications (9)
Different grades of Nd-Fe-B permanent magnets are available on the market today and their magnetic properties highly depend on the microstructure, which is controlled by the chemical composition of the alloy and the magnets’ manufacturing route. Gas atomization is a rapid solidification technique that is seldom used for the production of Nd-Fe-B ma...
The magnetic properties of an Nd-Fe-B-type permanent magnet depend on the microstructure and the chemistry of the material. To compensate for unfavorable microstructural features, such as micron-sized grains of the hard-magnetic phase, the intrinsic coercivity is often enhanced by the addition of heavy-rare-earth elements, but these additions also...
Sintered Nd-Fe-B permanent magnets are the first choice for electro-mechanical devices that rely on hard-magnetic
materials to provide strong magnetic fields in a variety of operating conditions. However, the limitations
of conventional powder-metallurgy methods regarding the complexity of the magnet’s geometry restrict
the design freedom for elect...
Magnetic remanence (Br) and coercivity (Hc) of hard magnets play a crucial role in electro-mechanical devices like electrical motors or generators. Elevated remanence ensures high efficiency of the device, and large coercivity protects the magnet from demagnetization. Usually, the increase of one comes at the cost of the other, such that the materi...
The goal of this study was to justify the reprocessing of recycled HDDR Nd-Fe-B powders with spark plasma sintering (SPS) and to investigate the dependence of the final magnetic properties on SPS and thermal treatment. The initial recycled HDDR powder of the composition Nd13.4Dy0.6Fe78.6B6.1Nb0.4Al0.7 with 4760 ppm O2 content, coercivity (HCi) = 83...
For two decades, NdFeB based magnets have been a critical component in a range of electrical devices engaged in energy production and conversion. The magnet shape and the internal microstructure of the selected NdFeB grade govern their efficiency and size. However, stricter requirements on device efficiency call for better performing magnets prefer...
