Maccari, Fernando ; Zintler, Alexander ; Brede, Thomas ; Radulov, Iliya A. ; Skokov, Konstantin P. ; Molina-Luna, Leopoldo ; Gutfleisch, Oliver (2023)
Ferromagnetic Mn–Al–C L10 Formation by Electric Current Assisted Annealing.
In: Advanced Engineering Materials
doi: 10.1002/adem.202201805
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
The ferromagnetic Mn–Al–C τ-phase ( tetragonal structure) shows intrinsic potential to be developed as a permanent magnet; however, this phase is metastable and is easily decomposed to nonmagnetic stable phases, affecting negatively the magnetic properties. Giving the necessity to careful control of its synthesis, the use of a novel approach is investigated using electric current–assisted annealing to obtain pure τ-phase samples. The temperature and electrical resistance of the samples are monitored during annealing and it is shown that the change in resistance can be used to probe the phase transformation. Upon increase of electric current density, the required temperature for the ferromagnetic phase formation is reduced, reaching a maximum shift of 140 °C at 45 A mm−2. Even though this noticeable shift is achieved, the magnetic properties are not affected showing coercivity of 0.13 T and magnetization of 90 Am2 kg−1, independently from the electric current density used during annealing. Microstructural investigation reveals the nucleation of the τ-phase at the grain boundaries of the parent ε-phase. In addition, the existence of twin boundaries upon nucleation and growth of the metastable phase for all evaluated annealing conditions is observed, resulting in similar extrinsic magnetic properties.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Maccari, Fernando ; Zintler, Alexander ; Brede, Thomas ; Radulov, Iliya A. ; Skokov, Konstantin P. ; Molina-Luna, Leopoldo ; Gutfleisch, Oliver |
| Art des Eintrags: | Bibliographie |
| Titel: | Ferromagnetic Mn–Al–C L10 Formation by Electric Current Assisted Annealing |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Februar 2023 |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Engineering Materials |
| DOI: | 10.1002/adem.202201805 |
| Kurzbeschreibung (Abstract): | The ferromagnetic Mn–Al–C τ-phase ( tetragonal structure) shows intrinsic potential to be developed as a permanent magnet; however, this phase is metastable and is easily decomposed to nonmagnetic stable phases, affecting negatively the magnetic properties. Giving the necessity to careful control of its synthesis, the use of a novel approach is investigated using electric current–assisted annealing to obtain pure τ-phase samples. The temperature and electrical resistance of the samples are monitored during annealing and it is shown that the change in resistance can be used to probe the phase transformation. Upon increase of electric current density, the required temperature for the ferromagnetic phase formation is reduced, reaching a maximum shift of 140 °C at 45 A mm−2. Even though this noticeable shift is achieved, the magnetic properties are not affected showing coercivity of 0.13 T and magnetization of 90 Am2 kg−1, independently from the electric current density used during annealing. Microstructural investigation reveals the nucleation of the τ-phase at the grain boundaries of the parent ε-phase. In addition, the existence of twin boundaries upon nucleation and growth of the metastable phase for all evaluated annealing conditions is observed, resulting in similar extrinsic magnetic properties. |
| Freie Schlagworte: | electric current–assisted annealing, metastable phase, Mn–Al–C permanent magnets, phase transformation |
| ID-Nummer: | Artikel-ID: 2201805 |
| Zusätzliche Informationen: | Special Issue: Manipulation of Matter Controlled by Electric and Magnetic Field: Towards Novel Synthesis and Processing Routes of Inorganic Materials |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Elektronenmikroskopie 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien |
| Hinterlegungsdatum: | 15 Mär 2023 06:10 |
| Letzte Änderung: | 19 Jul 2024 10:27 |
| PPN: | 505938421 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Ferromagnetic Mn–Al–C L1₀ Formation by Electric Current Assisted Annealing. (deposited 07 Nov 2023 12:49)
- Ferromagnetic Mn–Al–C L10 Formation by Electric Current Assisted Annealing. (deposited 15 Mär 2023 06:10) [Gegenwärtig angezeigt]
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