Microstructure, Thermal, and Magnetic Properties of Nanocrystalline/Amorphous Fe(Si,B,Nb) Powders Synthesized by Mechanical Alloying
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Microstructure, Thermal, and Magnetic Properties of Nanocrystalline/Amorphous Fe(Si,B,Nb) Powders Synthesized by Mechanical Alloying
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/LM2023073" target="_blank" >LM2023073: The VR-1 Nuclear Experimental Hub</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Materials Engineering and Performance
ISSN
1059-9495
e-ISSN
1544-1024
Volume of the periodical
34
Issue of the periodical within the volume
19
Country of publishing house
US - UNITED STATES
Number of pages
18
Pages from-to
22355-22372
UT code for WoS article
001501993800001
EID of the result in the Scopus database
2-s2.0-105007249966