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Manufacturing of Textured Bulk Fe-SmCo5 Magnets by Severe Plastic Deformation
Lukas Weissitsch1, Martin Stückler1, Stefan Wurster1
1Erich Schmid Institute of Materials Science of the Austrian Academy of Sciences, 8700 Leoben, Austria.
Nanomaterials (Basel, Switzerland)
|March 26, 2022
Summary
This study explores exchange coupling in iron-samarium cobalt (Fe-SmCo5) composites. Severe deformation via ball-milling and high-pressure torsion (HPT) enhances magnetic properties and creates texture in nanostructured magnetic materials.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Exchange coupling between soft and hard magnetic phases is crucial for advanced magnetic materials.
- Achieving effective exchange coupling requires a two-phase microstructure, ideally with nanoscale dimensions.
- Producing bulk materials with nanoscale features for enhanced interface effects presents significant challenges.
Purpose of the Study:
- To investigate the influence of severe deformation on exchange coupling in Fe-SmCo5 composites.
- To explore the combined effects of ball-milling and high-pressure torsion (HPT) on magnetic properties.
- To assess the feasibility of producing bulk nanostructured magnetic materials with improved performance.
Main Methods:
- Preparation of Fe-SmCo5 composites using powder blends and ball-milled powder blends.
- Consolidation and severe plastic deformation of the composites via high-pressure torsion (HPT).
- Analysis of the effects of ball-milling and HPT on microstructure and magnetic exchange coupling.
Main Results:
- Severe deformation through ball-milling and HPT successfully induced texture in both Fe and SmCo5 phases.
- The applied shear deformation facilitated significant exchange coupling between the magnetic phases.
- Anisotropic magnetic behavior and enhanced overall magnetic performance were observed in the deformed composites.
Conclusions:
- Ball-milling and HPT are effective techniques for creating nanostructured Fe-SmCo5 composites with enhanced magnetic properties.
- Severe plastic deformation promotes texture and improves exchange coupling, leading to anisotropic magnetic behavior.
- This approach offers a viable route for engineering novel bulk magnetic materials with tailored performance.
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