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Impact of soft magnetic α‐Fe in hard Nd₂Fe₁₄B magnetic materials: A micromagnetic study

Reichel, Maximilian ; Groche, Peter ; Gutfleisch, Oliver ; Schröder, Jörg (2024)
Impact of soft magnetic α‐Fe in hard Nd₂Fe₁₄B magnetic materials: A micromagnetic study.
In: PAMM - Proceedings in Applied Mathematics and Mechanics, 2023, 23 (2)
doi: 10.26083/tuprints-00027212
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Impact of soft magnetic α‐Fe in hard Nd₂Fe₁₄B magnetic materials: A micromagnetic study
Language: English
Date: 28 May 2024
Place of Publication: Darmstadt
Year of primary publication: October 2023
Place of primary publication: Weinheim
Publisher: Wiley-VCH
Journal or Publication Title: PAMM - Proceedings in Applied Mathematics and Mechanics
Volume of the journal: 23
Issue Number: 2
Collation: 8 Seiten
DOI: 10.26083/tuprints-00027212
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

The striving for the independence of fossil energy sources by further development of renewable energies as well as the change in mobility act as a driving force on technological innovations. Magnetic materials with improved magnetic efficiency help to push the limits for optimized, low‐loss power conversion applications and electrification. Besides improving the chemical composition, that is, gaining better performance using alloys reduced or free of heavy rare earth elements, microstructure optimization has proven to be a crucial field of research. In order to better control the grain size, phase distribution and texture of the polycrystalline material, new process routes, such as severe plastic deformation, need to be investigated and explored in addition to the state‐of‐the‐art method – sintering. Here, attention must be paid to the possible formation of soft magnetic α‐Fe after the casting process prior to the actual deformation step, as these secondary phases negatively affect the hysteretic behavior of the magnet. Assistance in the analysis of the underlying magnetic mechanisms is provided by micromagnetic theory. Besides the reliable prediction of the magnetization distribution on micron‐scale, especially in a multi‐phase microstructure, it also allows for the analysis of the magnetic hysteresis behavior. This work provides a micromagnetic simulation frame work based on a finite element scheme. Relying on this framework the effective hysteresis behavior of two different heterogeneous microstructures (Nd₂Fe₁₄B and Nd₂Fe₁₄B/α‐Fe) are analyzed and compared.

Identification Number: Artikel-ID: e202300104
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-272126
Additional Information:

Special Issue:93rd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM)

Correction added on 08 September 2023, after first online publication: Projekt DEAL funding statement has been added.

Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Functional Materials
16 Department of Mechanical Engineering > Institute for Production Engineering and Forming Machines (PtU)
Date Deposited: 28 May 2024 11:54
Last Modified: 28 May 2024 11:54
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/27212
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