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    Wyświetlanie 1-3 z 3
    Tytuł:
    Structure and Properties of Composites Based on Mixed Morphology of Ferromagnetic Particles
    Autorzy:
    Bureš, R.
    Fáberová, M.
    Strečková, M.
    Birčáková, Z.
    Kollár, P.
    Füzer, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1200815.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.-t
    75.50.Bb
    Opis:
    Application potential of the soft magnetic composites increases with improvement of their functional properties. In addition to the magnetic properties, the mechanical properties of these materials are essential. The aim of this work was to investigate mechanical properties and their dependence on morphology of the ferromagnetic particles. Model composite based on Somaloy® and Vitroperm® powder was prepared using conventional powder metallurgy. The DC magnetic properties of composites based on two types of ferromagnetic particles with different shapes and structures are discussed in the relation with mechanical properties.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 140-141
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microwave Sintered Fe/MgO Soft Magnetic Composite
    Autorzy:
    Bureš, R.
    Fáberová, M.
    Kollár, P.
    Füzer, J.
    Dobák, S.
    Onderko, F.
    Kurek, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032291.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.-t
    75.50.-y
    62.20.-x
    Opis:
    Micro/nano soft magnetic composite based on the Fe microparticles and the MgO nanoparticles was prepared by cold pressing followed by microwave sintering. Magnetic and mechanical properties of the green compact as well as sintered samples were measured. Coercivity, permeability, resistivity, elastic modulus and transverse rupture strength values in dependence on MgO content were investigated. The influence of MgO content ratio on properties was different in the case of as pressed green samples in comparison to sintered bodies. Microstructure formation and its influence on mechanical and magnetic properties are discussed. The coercivity of the green compacts with 1-5 wt% of MgO exhibits approximately 460 A/m and after sintering decreases to approximately 290 A/m. The real part of complex permeability at the frequency of 100 kHz exhibits a maximum for 2 wt% of MgO in green compacts, while for 10 wt% in sintered samples. It was observed that increase of the content of MgO causes decrease of the permeability. Properties of the sintered composite are related to formation of magnesium ferrite as well as volume distribution of residual MgO in dependence on initial MgO ratio.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 780-782
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    FeSiBAlNiMo High Entropy Alloy Prepared by Mechanical Alloying
    Autorzy:
    Bureš, R.
    Hadraba, H.
    Fáberová, M.
    Kollár, P.
    Füzer, J.
    Roupcová, P.
    Strečková, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032753.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.-t
    75.50.Tt
    75.50.Kj
    62.20.-x
    Opis:
    High-entropy alloys have attracted increasing attentions because of their unique compositions, microstructures, and adjustable mechanical and functional properties. In this work, mechanical and magnetic properties of the FeSiBAlNiMo high-entropy alloy were studied in heat-treated conditions. Influence of temperature and time of sintering was investigated. The lowest coercivity H_c=370 A/m was reached at sintering temperature 580°C, during 20 min in Ar/10H₂ atmosphere. Resistivity decreases from R=0.006 Ωcm at 580°C of sintering temperature to R=0.0004 Ωcm at temperature 1100°C. Transverse rupture strength TRS = 340 MPa as well as the Young modulus E=87 GPa were much higher in the case of sintering at 1100°C in comparison to TRS = 5 MPa and E=7.5 GPa at sintering temperature 580°C. Low temperature consolidation made possible to structure recovery and stress relief of amorphous-nanocrystalline structure. Higher temperature above 1100°C induced sintering processes and formation of complex borides.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 771-773
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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