Thermal stability, crystallization and magnetic properties of Fe-Co-based metallic glasses

The aim of the paper was to investigate thermal stability, crystallization and magnetic properties of Fe-Co-based metallic glasses (MGs). Investigations were carried out on amorphous ribbons with the compositions of [(Fe 0.5 Co 0.5 ) 0.75 B 0.2 Si 0.05 ] 96 Nb 4 and [(Fe 0.6 Co 0.3 Ni 0.1 ) 0.75 B 0...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2016-09, Vol.125 (3), p.1143-1149
Main Authors: Lesz, S., Kwapuliński, P., Nabiałek, M., Zackiewicz, P., Hawelek, L.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Calorimetry
Chemistry
Chemistry and Materials Science
Diffraction
Inorganic Chemistry
Magnetic properties
Magnetization
Measurement Science and Instrumentation
Metallic glasses
Physical Chemistry
Polymer Sciences
Thermal properties
X-rays
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Summary:The aim of the paper was to investigate thermal stability, crystallization and magnetic properties of Fe-Co-based metallic glasses (MGs). Investigations were carried out on amorphous ribbons with the compositions of [(Fe 0.5 Co 0.5 ) 0.75 B 0.2 Si 0.05 ] 96 Nb 4 and [(Fe 0.6 Co 0.3 Ni 0.1 ) 0.75 B 0.2 Si 0.05 ] 96 Nb 4 . Thermal properties (liquidus T l and melting T m temperatures) of the pre-alloyed ingots upon heating and cooling were analyzed by DTA at a heating/cooling rate of 0.33 K s −1 under the purified argon atmosphere. The structure of the ribbons was examined by X-ray diffraction (XRD) and transmission electron microscopy (TEM) method. Kinetics of the crystallization process was examined by applying differential scanning calorimetry (DSC) method, and experiments performed in thermal analysis involve heating at a constant rates β  = 0.17, 0.33 and 0.5 K s −1 . Additionally, the conventional crystallization temperature T x was determined from the normalized isochronal resistivity curves α ( T ) with heating rate 0.0083 K s −1 . α is the temperature coefficient of resistance and α  =  ρ −1 d ρ/ d T. The T x , can be obtained from the condition α  = 0 (Stokłosa et al. in J Alloy Compd 509(37):9050–9054, 2011 ). The saturation magnetization M ( T ) was measured in situ with heating rates 0.083 K s −1 using magnetic balance (Szewieczek and Lesz in J Mater Process Tech 162–163:254–259, 2005 ).
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-016-5430-x