Cargando…

Magnetic Properties of a High-Pressure Torsion Deformed Co-Zr Alloy

Co-Zr amorphous alloys exhibit soft magnetic properties, whereas the Co-rich crystalline magnetic phases in this alloy system displayed a hard magnetic behavior. 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-pressur...

Descripción completa

Detalles Bibliográficos
Autores principales: Stückler, Martin, Wurster, Stefan, Alfreider, Markus, Zawodzki, Michael, Krenn, Heinz, Bachmaier, Andrea
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10458657/
https://www.ncbi.nlm.nih.gov/pubmed/37630863
http://dx.doi.org/10.3390/nano13162280
_version_ 1785097218703753216
author Stückler, Martin
Wurster, Stefan
Alfreider, Markus
Zawodzki, Michael
Krenn, Heinz
Bachmaier, Andrea
author_facet Stückler, Martin
Wurster, Stefan
Alfreider, Markus
Zawodzki, Michael
Krenn, Heinz
Bachmaier, Andrea
author_sort Stückler, Martin
collection PubMed
description Co-Zr amorphous alloys exhibit soft magnetic properties, whereas the Co-rich crystalline magnetic phases in this alloy system displayed a hard magnetic behavior. 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 composite’s structural evolution and its magnetic properties were investigated. HPT processing allowed us to achieve an amorphous microstructure with low coercivity in its as-deformed state. To further tune the alloy’s magnetic properties and study its crystallization behavior, various annealed states were investigated. The microstructural properties were correlated with the magnetic properties, and a decreasing coercivity with increasing annealing temperatures was observed despite the onset of crystallization in the amorphous alloy. At higher annealing temperatures, coercivity increased again. The results appear promising for obtaining tuneable rare-earth free magnetic materials by severe plastic deformation.
format Online
Article
Text
id pubmed-10458657
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-104586572023-08-27 Magnetic Properties of a High-Pressure Torsion Deformed Co-Zr Alloy Stückler, Martin Wurster, Stefan Alfreider, Markus Zawodzki, Michael Krenn, Heinz Bachmaier, Andrea Nanomaterials (Basel) Article Co-Zr amorphous alloys exhibit soft magnetic properties, whereas the Co-rich crystalline magnetic phases in this alloy system displayed a hard magnetic behavior. 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 composite’s structural evolution and its magnetic properties were investigated. HPT processing allowed us to achieve an amorphous microstructure with low coercivity in its as-deformed state. To further tune the alloy’s magnetic properties and study its crystallization behavior, various annealed states were investigated. The microstructural properties were correlated with the magnetic properties, and a decreasing coercivity with increasing annealing temperatures was observed despite the onset of crystallization in the amorphous alloy. At higher annealing temperatures, coercivity increased again. The results appear promising for obtaining tuneable rare-earth free magnetic materials by severe plastic deformation. MDPI 2023-08-08 /pmc/articles/PMC10458657/ /pubmed/37630863 http://dx.doi.org/10.3390/nano13162280 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Stückler, Martin
Wurster, Stefan
Alfreider, Markus
Zawodzki, Michael
Krenn, Heinz
Bachmaier, Andrea
Magnetic Properties of a High-Pressure Torsion Deformed Co-Zr Alloy
title Magnetic Properties of a High-Pressure Torsion Deformed Co-Zr Alloy
title_full Magnetic Properties of a High-Pressure Torsion Deformed Co-Zr Alloy
title_fullStr Magnetic Properties of a High-Pressure Torsion Deformed Co-Zr Alloy
title_full_unstemmed Magnetic Properties of a High-Pressure Torsion Deformed Co-Zr Alloy
title_short Magnetic Properties of a High-Pressure Torsion Deformed Co-Zr Alloy
title_sort magnetic properties of a high-pressure torsion deformed co-zr alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10458657/
https://www.ncbi.nlm.nih.gov/pubmed/37630863
http://dx.doi.org/10.3390/nano13162280
work_keys_str_mv AT stucklermartin magneticpropertiesofahighpressuretorsiondeformedcozralloy
AT wursterstefan magneticpropertiesofahighpressuretorsiondeformedcozralloy
AT alfreidermarkus magneticpropertiesofahighpressuretorsiondeformedcozralloy
AT zawodzkimichael magneticpropertiesofahighpressuretorsiondeformedcozralloy
AT krennheinz magneticpropertiesofahighpressuretorsiondeformedcozralloy
AT bachmaierandrea magneticpropertiesofahighpressuretorsiondeformedcozralloy