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Influence of Cu Content on Structure, Thermal Stability and Magnetic Properties in Fe(72−x)Ni(8)Nb(4)Cu(x)Si(2)B(14) Alloys
The effect of substitution of Fe by Cu on the crystal structure and magnetic properties of Fe(72−x)Ni(8)Nb(4)Cu(x)Si(2)B(14) alloys (x = 0.6, 1.1, 1.6 at.%) in the form of ribbons was investigated. The chemical composition of the materials was established on the basis of the calculated minima of the...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7915262/ https://www.ncbi.nlm.nih.gov/pubmed/33557314 http://dx.doi.org/10.3390/ma14040726 |
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author | Warski, Tymon Radon, Adrian Zackiewicz, Przemyslaw Wlodarczyk, Patryk Polak, Marcin Wojcik, Anna Maziarz, Wojciech Kolano-Burian, Aleksandra Hawelek, Lukasz |
author_facet | Warski, Tymon Radon, Adrian Zackiewicz, Przemyslaw Wlodarczyk, Patryk Polak, Marcin Wojcik, Anna Maziarz, Wojciech Kolano-Burian, Aleksandra Hawelek, Lukasz |
author_sort | Warski, Tymon |
collection | PubMed |
description | The effect of substitution of Fe by Cu on the crystal structure and magnetic properties of Fe(72−x)Ni(8)Nb(4)Cu(x)Si(2)B(14) alloys (x = 0.6, 1.1, 1.6 at.%) in the form of ribbons was investigated. The chemical composition of the materials was established on the basis of the calculated minima of thermodynamic parameters: Gibbs free energy of amorphous phase formation ΔG(amorph) (minimum at 0.6 at.% of Cu) and Gibbs free energy of mixing ΔG(mix) (minimum at 1.6 at.% of Cu). The characteristic crystallization temperatures T(x)(1onset) and T(x)(1) of the alpha-iron phase together with the activation energy E(a) for the as-spun samples were determined by differential scanning calorimetry (DSC) with a heating rate of 10–100 °C/min. In order to determine the optimal soft magnetic properties, the wound cores were subjected to a controlled isothermal annealing process in the temperature range of 340–640 °C for 20 min. Coercivity Hc, saturation induction Bs and core power losses at B = 1 T and frequency f = 50 Hz P(10/50) were determined for all samples. Moreover, for the samples with the lowest Hc and P(10/50), the magnetic losses were determined in a wider frequency range 50 Hz–400 kHz. The real and imaginary parts of the magnetic permeability µ′, µ″ along with the cut-off frequency were determined for the samples annealed at 360, 460, and 560 °C. The best soft magnetic properties (i.e., the lowest value of Hc and P(10/50)) were observed for samples annealed at 460 °C, with Hc = 4.88–5.69 A/m, Bs = 1.18–1.24 T, P(10/50) = 0.072–0.084 W/kg, µ′ = 8350–10,630 and cutoff frequency at 8–9.3 × 10(4) Hz. The structural study of as-spun and annealed ribbons was carried out using X-ray diffraction (XRD) and a transmission electron microscope (TEM). |
format | Online Article Text |
id | pubmed-7915262 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-79152622021-03-01 Influence of Cu Content on Structure, Thermal Stability and Magnetic Properties in Fe(72−x)Ni(8)Nb(4)Cu(x)Si(2)B(14) Alloys Warski, Tymon Radon, Adrian Zackiewicz, Przemyslaw Wlodarczyk, Patryk Polak, Marcin Wojcik, Anna Maziarz, Wojciech Kolano-Burian, Aleksandra Hawelek, Lukasz Materials (Basel) Article The effect of substitution of Fe by Cu on the crystal structure and magnetic properties of Fe(72−x)Ni(8)Nb(4)Cu(x)Si(2)B(14) alloys (x = 0.6, 1.1, 1.6 at.%) in the form of ribbons was investigated. The chemical composition of the materials was established on the basis of the calculated minima of thermodynamic parameters: Gibbs free energy of amorphous phase formation ΔG(amorph) (minimum at 0.6 at.% of Cu) and Gibbs free energy of mixing ΔG(mix) (minimum at 1.6 at.% of Cu). The characteristic crystallization temperatures T(x)(1onset) and T(x)(1) of the alpha-iron phase together with the activation energy E(a) for the as-spun samples were determined by differential scanning calorimetry (DSC) with a heating rate of 10–100 °C/min. In order to determine the optimal soft magnetic properties, the wound cores were subjected to a controlled isothermal annealing process in the temperature range of 340–640 °C for 20 min. Coercivity Hc, saturation induction Bs and core power losses at B = 1 T and frequency f = 50 Hz P(10/50) were determined for all samples. Moreover, for the samples with the lowest Hc and P(10/50), the magnetic losses were determined in a wider frequency range 50 Hz–400 kHz. The real and imaginary parts of the magnetic permeability µ′, µ″ along with the cut-off frequency were determined for the samples annealed at 360, 460, and 560 °C. The best soft magnetic properties (i.e., the lowest value of Hc and P(10/50)) were observed for samples annealed at 460 °C, with Hc = 4.88–5.69 A/m, Bs = 1.18–1.24 T, P(10/50) = 0.072–0.084 W/kg, µ′ = 8350–10,630 and cutoff frequency at 8–9.3 × 10(4) Hz. The structural study of as-spun and annealed ribbons was carried out using X-ray diffraction (XRD) and a transmission electron microscope (TEM). MDPI 2021-02-04 /pmc/articles/PMC7915262/ /pubmed/33557314 http://dx.doi.org/10.3390/ma14040726 Text en © 2021 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Warski, Tymon Radon, Adrian Zackiewicz, Przemyslaw Wlodarczyk, Patryk Polak, Marcin Wojcik, Anna Maziarz, Wojciech Kolano-Burian, Aleksandra Hawelek, Lukasz Influence of Cu Content on Structure, Thermal Stability and Magnetic Properties in Fe(72−x)Ni(8)Nb(4)Cu(x)Si(2)B(14) Alloys |
title | Influence of Cu Content on Structure, Thermal Stability and Magnetic Properties in Fe(72−x)Ni(8)Nb(4)Cu(x)Si(2)B(14) Alloys |
title_full | Influence of Cu Content on Structure, Thermal Stability and Magnetic Properties in Fe(72−x)Ni(8)Nb(4)Cu(x)Si(2)B(14) Alloys |
title_fullStr | Influence of Cu Content on Structure, Thermal Stability and Magnetic Properties in Fe(72−x)Ni(8)Nb(4)Cu(x)Si(2)B(14) Alloys |
title_full_unstemmed | Influence of Cu Content on Structure, Thermal Stability and Magnetic Properties in Fe(72−x)Ni(8)Nb(4)Cu(x)Si(2)B(14) Alloys |
title_short | Influence of Cu Content on Structure, Thermal Stability and Magnetic Properties in Fe(72−x)Ni(8)Nb(4)Cu(x)Si(2)B(14) Alloys |
title_sort | influence of cu content on structure, thermal stability and magnetic properties in fe(72−x)ni(8)nb(4)cu(x)si(2)b(14) alloys |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7915262/ https://www.ncbi.nlm.nih.gov/pubmed/33557314 http://dx.doi.org/10.3390/ma14040726 |
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