Maccari, Fernando ; Mishra, Tarini Prasad ; Keszler, Monica ; Braun, Tobias ; Adabifiroozjaei, Esmaeil ; Radulov, Iliya ; Jiang, Tianshu ; Bruder, Enrico ; Guillon, Olivier ; Molina-Luna, Leopoldo ; Bram, Martin ; Gutfleisch, Oliver (2023)
Nanocrystalline Nd–Fe–B Anisotropic Magnets by Flash Spark Plasma Sintering.
In: Advanced Engineering Materials, 2023, 25 (18)
doi: 10.26083/tuprints-00024691
Artikel, Zweitveröffentlichung, Verlagsversion
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
Kurzbeschreibung (Abstract)
Flash spark plasma sintering (flash SPS) is an attractive method to obtain Nd–Fe–B magnets with anisotropic magnetic properties when starting from melt‐spun powders. Compared to the benchmark processing route via hot pressing with subsequent die upsetting, flash SPS promises electroplasticity as an additional deformation mechanism and reduced tool wear, while maximizing magnetic properties by tailoring the microstructure—fully dense and high texture. A detailed parameter study is conducted to understand the influence of Flash SPS parameters on the densification and magnetic properties of commercial MQU‐F powder. It is revealed that the presintering conditions and preheating temperature before applying the power pulse play a major role for tailoring grain size and texture in the case of hot deformation via Flash SPS. Detailed microstructure and magnetic domain evaluation disclose the texture enhancement with increasing flash SPS temperature at the expense of coercivity. The best compromise between remanence and coercivity (1.37 T and 1195 kA m⁻¹, respectively) is achieved through a combination of presintering at 500 °C for 120 s and preheating temperature of 600 °C, resulting in a magnet with energy product (BH)max of 350 kJm⁻³. These findings show the potential of flash SPS to obtain fully dense anisotropic nanocrystalline magnets with high magnetic performance.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Maccari, Fernando ; Mishra, Tarini Prasad ; Keszler, Monica ; Braun, Tobias ; Adabifiroozjaei, Esmaeil ; Radulov, Iliya ; Jiang, Tianshu ; Bruder, Enrico ; Guillon, Olivier ; Molina-Luna, Leopoldo ; Bram, Martin ; Gutfleisch, Oliver |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Nanocrystalline Nd–Fe–B Anisotropic Magnets by Flash Spark Plasma Sintering |
| Sprache: | Englisch |
| Publikationsjahr: | 7 November 2023 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2023 |
| Ort der Erstveröffentlichung: | Weinheim |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Engineering Materials |
| Jahrgang/Volume einer Zeitschrift: | 25 |
| (Heft-)Nummer: | 18 |
| Kollation: | 14 Seiten |
| DOI: | 10.26083/tuprints-00024691 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/24691 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | Flash spark plasma sintering (flash SPS) is an attractive method to obtain Nd–Fe–B magnets with anisotropic magnetic properties when starting from melt‐spun powders. Compared to the benchmark processing route via hot pressing with subsequent die upsetting, flash SPS promises electroplasticity as an additional deformation mechanism and reduced tool wear, while maximizing magnetic properties by tailoring the microstructure—fully dense and high texture. A detailed parameter study is conducted to understand the influence of Flash SPS parameters on the densification and magnetic properties of commercial MQU‐F powder. It is revealed that the presintering conditions and preheating temperature before applying the power pulse play a major role for tailoring grain size and texture in the case of hot deformation via Flash SPS. Detailed microstructure and magnetic domain evaluation disclose the texture enhancement with increasing flash SPS temperature at the expense of coercivity. The best compromise between remanence and coercivity (1.37 T and 1195 kA m⁻¹, respectively) is achieved through a combination of presintering at 500 °C for 120 s and preheating temperature of 600 °C, resulting in a magnet with energy product (BH)max of 350 kJm⁻³. These findings show the potential of flash SPS to obtain fully dense anisotropic nanocrystalline magnets with high magnetic performance. |
| Freie Schlagworte: | anisotropic magnet, flash spark plasma sintering, nanocrystalline Nd-Fe-B, Nd-Fe-B magnets |
| ID-Nummer: | Artikel-ID: 2300252 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-246918 |
| Zusätzliche Informationen: | Special Issue: Manipulation of Matter Controlled by Electric and Magnetic Field: Towards Novel Synthesis and Processing Routes of Inorganic Materials |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 500 Naturwissenschaften und Mathematik > 540 Chemie |
| 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 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Physikalische Metallkunde |
| Hinterlegungsdatum: | 07 Nov 2023 12:24 |
| Letzte Änderung: | 24 Jul 2024 07:27 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Nanocrystalline Nd–Fe–B Anisotropic Magnets by Flash Spark Plasma Sintering. (deposited 07 Nov 2023 12:24) [Gegenwärtig angezeigt]
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