Corrosion-resistant polymer-based nanocomposite materials with a high level of microwave absorption and soft magnetic materials based on iron oxide nanopowder obtained by electroerosion dispersion

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Tetiana Prikhna - , NASU - Bakul Institute for Superhard Materials, Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • Mykola Monastyrov - , NASU - Bakul Institute for Superhard Materials (Autor:in)
  • Ivan Soldatov - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • Bernd Büchner - , Professur für Experimentelle Festkörperphysik (gB/IFW), Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • Lars Giebeler - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • Aniruddha Sathyadharma Prasad - , Professur für Experimentelle Festkörperphysik (gB/IFW), Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • Orest Ostash - , NASU - Karpenko Physico-Mechanical Institute (Autor:in)
  • Viktor Moshchil - , NASU - Bakul Institute for Superhard Materials (Autor:in)
  • Viktoriya Podhurska - , NASU - Karpenko Physico-Mechanical Institute (Autor:in)
  • Pavel Potapov - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • Vitaliy Romaka - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • Kai Neufeld - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • Robert Kluge - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • Tetiana Serbenyuk - , NASU - Bakul Institute for Superhard Materials (Autor:in)
  • Myroslav Karpets - , NASU - Bakul Institute for Superhard Materials, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" (Autor:in)
  • Mykhaylo Omelyanenko - , National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" (Autor:in)
  • Anja Wolter-Giraud - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • Semyon Ponomaryov - , National Academy of Sciences of Ukraine (Autor:in)

Abstract

Nanopowder of iron oxide (mainly Fe3O4) has been obtained by electroerosion dispersion method and was used for manufacturing of gradient polymer-based microwave absorbing materials which absorb (1) on 36.6 GHz with a level of absorption of 99% (with a maximum penetration −40 dB and reflection −23 dB) and (2) on 10 GHz and 36.6 GHz with an absorption of 90% and 98.4%, correspondently (with a maximum reflection −18 dB and −10 dB and penetration −40 dB and −60 dB, respectively). It was demonstrated, that change of magnetic properties of the absorbing material under mechanical load can be used for non-destructive control. Sintered under high pressure-high temperature conditions (2 GPa, at 900, 1000, 1100, 1200 and 1300 °C for 4 min) iron oxide nanopowder in presence of hexagonal boron nitride (hBN) demonstrated soft magnetic behavior. Electron Backscatter Diffraction (EBSD) study has showed that during sintering the grains have grown beyond the superparamagnetic size limit inspire short annealing time. The structure of sintered materials was investigated using X-ray diffraction with a full-profile fitting procedure. The materials sintered at 2 GPa at 900 and 1000 °C contained 75–80 wt% of FeO and 25–20 wt% Fe. Materials sintered at 1100 oC, along with 32 wt% FeO and 2 wt% Fe, contained a significant amount of Fe3N: 66 wt%. However, materials sintered at 1200–1300 °C contain almost pure Fe3N phase. Thus, under conditions of high pressures and temperatures with increasing sintering temperature, reduction of iron oxide was observed, followed by its nitriding with nitrogen released from the boron nitride, which led to a reduction of coercive force and thus improving soft magnetic characteristics of the sintered materials. The scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX) study of the sample, sintered at 1300 oC showed approximate composition of Fe3N0.8C0.3-0.6O0.06-0.3.

Details

OriginalspracheEnglisch
Seiten (von - bis)24322-24331
Seitenumfang10
FachzeitschriftCeramics international
Jahrgang49
Ausgabenummer14
PublikationsstatusVeröffentlicht - 15 Juli 2023
Peer-Review-StatusJa

Schlagworte

Schlagwörter

  • Composites, Electron microscopy, Powders: gas phase reaction, Precursors: organic, Soft magnets, Transition metal oxides