Journal Article

PUBDB-2024-07789

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Influence of Severe Plastic Deformation on the Magnetic Properties of Sm–Co Permanent Magnets

Paulischin, A. (Corresponding author)Extern* ; Weissitsch, L.Extern* ; Wurster, S.Extern* ; Fellner, S. ; Krenn, H. ; Bachmaier, A. (Corresponding author)Extern*

2024
Wiley-VCH Verl. Weinheim

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Please use a persistent id in citations: doi:10.1002/adem.202400253  doi:10.3204/PUBDB-2024-07789

Abstract: High pressure torsion (HPT) is presented as a new fabrication route to produce bulk Sm–Co magnets with a strongly refined microstructure down to the nanometer regime. The initial powders, based on the compositions SmCo5, Sm2Co7 and Sm2Co17, are compacted and subsequently deformed by HPT. The microstructural evolution in dependence on the applied deformation parameters is characterized by electron microscopy and the effect of HPT on the phase stability is monitored by synchrotron X-ray diffraction. An increasing amount of applied strain leads to a stronger reduction in grain size while strain localization counteracts a homogeneous microstructural refinement. The positive effect of elevated deformation temperatures is demonstrated for Sm2Co17, which promotes homogeneous grain refinement, but causes strain-induced phase transformations at the same time, strongly affecting the magnetic behavior. Superconducting quantum interference device magnetometry is used to characterize the magnetic properties after HPT deformation, which indicates the formation of a magnetic texture depending on the respective phase.

Note: The publication is non-open accessible. Thus i cannot guarantee a copyright permission by the publisher to make the Post-Referee version publicly available.

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Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. SpdTuM - SPD nanostructured magnets with tuneable properties (757333) (757333)
3. FS-Proposal: I-20220454 EC (I-20220454-EC) (I-20220454-EC)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)
2. PETRA Beamline P21.2 (PETRA III)

Appears in the scientific report 2024

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; DEAL Wiley ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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