Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Magnetic Properties of High-Pressure Torsion Deformed Co-Zr

Martin Stückler
ORCID logo ,
Stefan Wurster
ORCID logo ,
Markus Alfreider
ORCID logo ,
Michael Zawodzki
,
Heinz Krenn
,
Andrea Bachmaier
* ORCID logo
Version 1 : Received: 10 July 2023 / Approved: 10 July 2023 / Online: 10 July 2023 (14:46:55 CEST)

A peer-reviewed article of this Preprint also exists.

Stückler, M.; Wurster, S.; Alfreider, M.; Zawodzki, M.; Krenn, H.; Bachmaier, A. Magnetic Properties of a High-Pressure Torsion Deformed Co-Zr Alloy. Nanomaterials 2023, 13, 2280. Stückler, M.; Wurster, S.; Alfreider, M.; Zawodzki, M.; Krenn, H.; Bachmaier, A. Magnetic Properties of a High-Pressure Torsion Deformed Co-Zr Alloy. Nanomaterials 2023, 13, 2280.

Abstract

Co-Zr amorphous alloys exhibit soft magnetic properties, whereas Co-rich crystalline magnetic phases in this alloy system display hard magnetic behaviour. In this study, an initial two-phase Co-Zr composite with an overall composition of 75 at.% Co and 25 at.% Zr was processed by high pressure torsion (HPT) and the effects of severe plastic deformation and subsequent thermal treatment on the structural evolution and its magnetic properties have been investigated. HPT processing allowed us to achieve an amorphous microstructure in the as-deformed state with low coercivity. To further tune magnetic properties and study the alloys’ crystallization behaviour, various annealed states are investigated. Microstructural properties are correlated to the magnetic properties and a decreasing coercivity with increasing annealing temperature is observed despite the onset of crystallization in the amorphous alloy. At higher annealing temperatures, coercivity increases again. The results appear promising to obtain tuneable rare-earth free magnetic materials by severe plastic deformation.

Keywords

severe plastic deformation; amorphous alloys; magnetic properties; nanocrystallization

Subject

Physical Sciences, Condensed Matter Physics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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