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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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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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 |
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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 |
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