Microstructure, Thermal, and Magnetic Properties of Nanocrystalline/Amorphous Fe(Si,B,Nb) Powders Synthesized by Mechanical Alloying

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F25%3A00385776" target="_blank" >RIV/68407700:21340/25:00385776 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/s11665-025-11475-0" target="_blank" >https://doi.org/10.1007/s11665-025-11475-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11665-025-11475-0" target="_blank" >10.1007/s11665-025-11475-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure, Thermal, and Magnetic Properties of Nanocrystalline/Amorphous Fe(Si,B,Nb) Powders Synthesized by Mechanical Alloying

Popis výsledku v původním jazyce

In this work, two compositions Fe72Si16B5Nb7 and Fe75Si13B5Nb7 were elaborated by mechanical alloying (MA) of the elemental high-purity powder mixture. The morphological, microstructural, and thermal properties were analyzed using scanning electron microscopy (SEM) attached with energy dispersive spectroscopy (EDS), x-ray diffraction (XRD), and differential scanning calorimetry (DSC). The magnetic and hyperfine properties of the mixture elements during MA (0-64 h) were investigated by vibrating sample magnetometer (VSM) and Mössbauer spectroscopy (MS). Structural analysis by Rietveld refinement of the XRD pattern of the samples milled 4 h reveals the coexistence of various structures; Fe3Si, bcc-Fe, Fe23B6, and a small amount of Nb and Si, for the samples milled 16 h 32 h and 64 h the that the structure became much more and more amorphous, and the amorphous phase becomes the dominant phase. The DSC of the annealing of sample Fe72Si16B5Nb7 milled 64 h shows that the crystallization of the amorphous phases, and the activation energy determined using Kissinger's equation was 611.84 ± 10 KJ/mol. Mössbauer spectroscopy analysis confirmed a progressive amorphization of the material, accompanied by a reduction in the α-Fe crystalline phase content. In addition, for sample Fe75Si13B5Nb7 milled 64 h, the Mössbauer spectroscopy exhibits a paramagnetic doublet with a relatively small area fraction and a singlet, possibly assigned to the γ-Fe phase not detected by XRD. The VSM measurements show the hysteresis loops as a sigmoidal sharp, typically of nanomaterial or amorphous with little magnetic domain. The evolution of the coercivity and the saturation magnetization with milling time are discussed regarding different phenomena, such as residual stress, grain refinement, amorphous phase formation, surface anisotropy, defect density, and particle surface irregularities. ASM International 2025.

Název v anglickém jazyce

Microstructure, Thermal, and Magnetic Properties of Nanocrystalline/Amorphous Fe(Si,B,Nb) Powders Synthesized by Mechanical Alloying

Popis výsledku anglicky

In this work, two compositions Fe72Si16B5Nb7 and Fe75Si13B5Nb7 were elaborated by mechanical alloying (MA) of the elemental high-purity powder mixture. The morphological, microstructural, and thermal properties were analyzed using scanning electron microscopy (SEM) attached with energy dispersive spectroscopy (EDS), x-ray diffraction (XRD), and differential scanning calorimetry (DSC). The magnetic and hyperfine properties of the mixture elements during MA (0-64 h) were investigated by vibrating sample magnetometer (VSM) and Mössbauer spectroscopy (MS). Structural analysis by Rietveld refinement of the XRD pattern of the samples milled 4 h reveals the coexistence of various structures; Fe3Si, bcc-Fe, Fe23B6, and a small amount of Nb and Si, for the samples milled 16 h 32 h and 64 h the that the structure became much more and more amorphous, and the amorphous phase becomes the dominant phase. The DSC of the annealing of sample Fe72Si16B5Nb7 milled 64 h shows that the crystallization of the amorphous phases, and the activation energy determined using Kissinger's equation was 611.84 ± 10 KJ/mol. Mössbauer spectroscopy analysis confirmed a progressive amorphization of the material, accompanied by a reduction in the α-Fe crystalline phase content. In addition, for sample Fe75Si13B5Nb7 milled 64 h, the Mössbauer spectroscopy exhibits a paramagnetic doublet with a relatively small area fraction and a singlet, possibly assigned to the γ-Fe phase not detected by XRD. The VSM measurements show the hysteresis loops as a sigmoidal sharp, typically of nanomaterial or amorphous with little magnetic domain. The evolution of the coercivity and the saturation magnetization with milling time are discussed regarding different phenomena, such as residual stress, grain refinement, amorphous phase formation, surface anisotropy, defect density, and particle surface irregularities. ASM International 2025.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LM2023073" target="_blank" >LM2023073: Jaderné experimentální centrum VR-1</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Materials Engineering and Performance

ISSN

1059-9495

e-ISSN

1544-1024

Svazek periodika

34

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

18

Strana od-do

22355-22372

Kód UT WoS článku

001501993800001

EID výsledku v databázi Scopus

2-s2.0-105007249966