Cargando…

Structural, Thermal and Magnetic Analysis of Two Fe-X-B (X = Nb, NiZr) Nanocrystalline Alloy

High-energy ball milling was used to produce two Fe-X-B (X = Nb, NiZr) nanocrystalline alloys. X-ray diffraction (XRD), differential scanning calorimetry (DSC), and vibrating sample magnetometry (VSM) were used to analyze the microstructure, thermal, and magnetic characteristics of the milled powder...

Descripción completa

Detalles Bibliográficos
Autores principales: Zaara, Kaouther, Daza, Jason, Ben Mbarek, Wael, Suñol, Joan-Josep
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9821811/
https://www.ncbi.nlm.nih.gov/pubmed/36614494
http://dx.doi.org/10.3390/ma16010155
_version_ 1784865788905127936
author Zaara, Kaouther
Daza, Jason
Ben Mbarek, Wael
Suñol, Joan-Josep
author_facet Zaara, Kaouther
Daza, Jason
Ben Mbarek, Wael
Suñol, Joan-Josep
author_sort Zaara, Kaouther
collection PubMed
description High-energy ball milling was used to produce two Fe-X-B (X = Nb, NiZr) nanocrystalline alloys. X-ray diffraction (XRD), differential scanning calorimetry (DSC), and vibrating sample magnetometry (VSM) were used to analyze the microstructure, thermal, and magnetic characteristics of the milled powders, the agglomerated particles (also generated during the milling process), and the compacted specimens of both alloys. The main crystallographic phase is always a bcc Fe-rich solid solution; whereas a minor Nb(B) phase is detected on powders and agglomerated particles in the Fe(80)Nb(8)B(12) alloy. The crystalline size of the Fe(80)(NiZr)(8)B(12) alloy is between 11 and 14 nm, whereas in the Fe(80)Nb(8)B(12) alloy, it ranges between 8 and 12 nm. Microstrain and dislocation density are higher in agglomerated samples for both alloys than in milled powders. Thermal analysis detects structural relaxation and crystal growth exothermic processes with high dispersion in the temperature intervals and in the calculated apparent activation energy of the main crystallization process. Regarding magnetic behavior, the coercivity values of all powdered-agglomerated specimens were around 800 A/m. The coercivity is higher in compacted sample, but controlled annealing favors enhanced soft behavior.
format Online
Article
Text
id pubmed-9821811
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-98218112023-01-07 Structural, Thermal and Magnetic Analysis of Two Fe-X-B (X = Nb, NiZr) Nanocrystalline Alloy Zaara, Kaouther Daza, Jason Ben Mbarek, Wael Suñol, Joan-Josep Materials (Basel) Article High-energy ball milling was used to produce two Fe-X-B (X = Nb, NiZr) nanocrystalline alloys. X-ray diffraction (XRD), differential scanning calorimetry (DSC), and vibrating sample magnetometry (VSM) were used to analyze the microstructure, thermal, and magnetic characteristics of the milled powders, the agglomerated particles (also generated during the milling process), and the compacted specimens of both alloys. The main crystallographic phase is always a bcc Fe-rich solid solution; whereas a minor Nb(B) phase is detected on powders and agglomerated particles in the Fe(80)Nb(8)B(12) alloy. The crystalline size of the Fe(80)(NiZr)(8)B(12) alloy is between 11 and 14 nm, whereas in the Fe(80)Nb(8)B(12) alloy, it ranges between 8 and 12 nm. Microstrain and dislocation density are higher in agglomerated samples for both alloys than in milled powders. Thermal analysis detects structural relaxation and crystal growth exothermic processes with high dispersion in the temperature intervals and in the calculated apparent activation energy of the main crystallization process. Regarding magnetic behavior, the coercivity values of all powdered-agglomerated specimens were around 800 A/m. The coercivity is higher in compacted sample, but controlled annealing favors enhanced soft behavior. MDPI 2022-12-24 /pmc/articles/PMC9821811/ /pubmed/36614494 http://dx.doi.org/10.3390/ma16010155 Text en © 2022 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
Zaara, Kaouther
Daza, Jason
Ben Mbarek, Wael
Suñol, Joan-Josep
Structural, Thermal and Magnetic Analysis of Two Fe-X-B (X = Nb, NiZr) Nanocrystalline Alloy
title Structural, Thermal and Magnetic Analysis of Two Fe-X-B (X = Nb, NiZr) Nanocrystalline Alloy
title_full Structural, Thermal and Magnetic Analysis of Two Fe-X-B (X = Nb, NiZr) Nanocrystalline Alloy
title_fullStr Structural, Thermal and Magnetic Analysis of Two Fe-X-B (X = Nb, NiZr) Nanocrystalline Alloy
title_full_unstemmed Structural, Thermal and Magnetic Analysis of Two Fe-X-B (X = Nb, NiZr) Nanocrystalline Alloy
title_short Structural, Thermal and Magnetic Analysis of Two Fe-X-B (X = Nb, NiZr) Nanocrystalline Alloy
title_sort structural, thermal and magnetic analysis of two fe-x-b (x = nb, nizr) nanocrystalline alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9821811/
https://www.ncbi.nlm.nih.gov/pubmed/36614494
http://dx.doi.org/10.3390/ma16010155
work_keys_str_mv AT zaarakaouther structuralthermalandmagneticanalysisoftwofexbxnbnizrnanocrystallinealloy
AT dazajason structuralthermalandmagneticanalysisoftwofexbxnbnizrnanocrystallinealloy
AT benmbarekwael structuralthermalandmagneticanalysisoftwofexbxnbnizrnanocrystallinealloy
AT sunoljoanjosep structuralthermalandmagneticanalysisoftwofexbxnbnizrnanocrystallinealloy