The influence of ultra-rapid annealing on nanocrystallization and magnetic properties of Fe76−xNi10B14Cux alloys

Kolano-Burian, Aleksandra; Kowalczyk, M.; Grabias, A.; Radoń, Adrian; Błyskun, P.; Warski, Tymon; Karpiński, Marcin; Hawełek, ᴌ.; Kulik, T.

doi:10.1016/j.jallcom.2022.165943

Cited by 8 publications

(5 citation statements)

References 43 publications

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“…A similar behaviour was firstly reported by Kopcewicz et al in a similar system with 20% Ni content [19]. The first crystallisation stage, though contentious, has been intensively studied [17][18][19][43][44][45][46][47]. During this primary crystallisation stage, the partial transformation from the amorphous to the α-/bcc-(Fe,Ni) phase together with a minimal fcc-(Fe,Ni) phase is broadly accepted.…”

Section: Structural and Magnetic Characterisationsupporting

confidence: 72%

“…This second phase-transition is sensitive to the Ni content as reported for the (Fe1-xNix)81Nb7B12 ribbon samples and results in a decrease in both their ferromagnetic-strength and their transition temperatures [17]. Investigations of the crystallisation of amorphous alloys are usually accompanied by DSC measurements at high enough heating-rates so that it intensifies the subtle features behind the transition [43,44]. Figure 1b depicts the formation of distinctive nanocrystalline phases for the as-cast (Fe3Ni)81Nb7B12 amorphous ribbon by a DSC curve performed at a heating rate of 10 K/min.…”

Section: Structural and Magnetic Characterisationmentioning

confidence: 94%

“…Investigations of the crystallisation of amorphous alloys are usually accompanied by DSC measurements at high enough heating-rates so that it intensifies the subtle features behind the transition [43,44]. Figure 1b depicts the formation of distinctive nanocrystalline phases for the as-cast (Fe 3 Ni) 81 Nb 7 B 12 amorphous ribbon by a DSC curve performed at a heating rate of 10 K/min.…”

Section: Structural and Magnetic Characterisationmentioning

confidence: 99%

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Tailoring Magnetic Properties and Magnetoimpedance Response in Nanocrystalline (Fe3Ni)81Nb7B12 Ribbons for Sensor Applications

et al. 2023

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Today, there is an increasing demand for progress in the magnetoimpedance (MI) response of cost-effective soft-magnetic materials for use in high-performance sensing devices. In view of this, we investigate here the field-annealing effects on soft-magnetic properties, magnetoimpedance response, and field sensitivity in the nanocrystalline (Fe3Ni)81Nb7B12 alloy ribbons. We observe that within the low-frequency regime, between 2 and 5 MHz, the zero-field-annealed (ZFA) ribbons exhibit the highest magnetoimpedance values. By magneto-optical Kerr effect measurements, we show that this result stems from the formation of irregular transversally patched magnetic domains after annealing, which in turn explains the induced transverse anisotropy necessary to increase the GMI response. In addition, we discuss this increment in terms of skin effect. Moreover, we report that the highest sensitivity of ca. 189%/(kA/m)—15%/Oe—is achieved for the field-annealed samples whose magnetic field was applied transverse to the ribbon axis. These findings are of practical importance to develop and refine highly sensitive magnetic sensors.

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Section: Structural and Magnetic Characterisationsupporting

confidence: 72%

Section: Structural and Magnetic Characterisationmentioning

confidence: 94%

Section: Structural and Magnetic Characterisationmentioning

confidence: 99%

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Tailoring Magnetic Properties and Magnetoimpedance Response in Nanocrystalline (Fe3Ni)81Nb7B12 Ribbons for Sensor Applications

et al. 2023

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“…the ribbons were ultra-rapidly annealed at 773 k for 0.5÷14 s with a heating rate of ~100 k/s. the uRA process was performed in a specially designed and constructed apparatus, more details about this device can be found elsewhere [17]. the microstructure of ribbons was examined using a tecnai g2 transmission electron Microscope (teM) and magnetic domain structure was analysed by lorentz teM (l-teM) with use of thermo-scientific titan themis x-Fegthemis Cs corrected teM microscope.…”

Section: Methodsmentioning

confidence: 99%

TEM, HREM, L-TEM Studies of Fe-Based Soft Magnetic Melt-Spun Ribbons Subjected to Ultra-Rapid Annealing Process

Maziarz,

Kolano-Burian,

Kowalczyk

et al. 2023

Archives of Metallurgy and Materials

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To uLTRa-Rapid annEaLing pRocESS in the present work, we performed the ultra-rapid annealing (ura) process for amorphous Fe 78 ni 8 B 14 melt-spun ribbons in order to obtain fine excellent microstructure assuring the best soft magnetic properties. several microscopic methods mainly based on transmission electron microscopy (teM) and lorentz teM (l-teM) were applied for detailed studies of the microstructure and magnetic domains structure. the investigation revealed that the optimized parameters of the uRA process (500°C/0.5-5 s) lead to outstanding soft magnetic properties. A mixture containing close to 50% amorphous phase and 50% α-Fe nanocrystals of size up to 30 nm has been already obtained after annealing for 3 s. these annealing conditions appear to be the most suitable in terms of microstructure providing the best magnetic properties.

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“…These alloys are employed as ultrasoft magnets in a variety of commercial applications, including telecommunications, microdevices, and power electronics [3]. The above alloys are often created as amorphous using rapid solidification processes; however, a nanocrystalline structure was detected following further annealing [4]. Another production method to directly manufacture nanocrystalline alloys with these compositions is mechanical alloying (MA) of elemental powders.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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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 Fe80Nb8B12 alloy. The crystalline size of the Fe80(NiZr)8B12 alloy is between 11 and 14 nm, whereas in the Fe80Nb8B12 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.

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The influence of ultra-rapid annealing on nanocrystallization and magnetic properties of Fe76−xNi10B14Cux alloys

Cited by 8 publications

References 43 publications

Tailoring Magnetic Properties and Magnetoimpedance Response in Nanocrystalline (Fe3Ni)81Nb7B12 Ribbons for Sensor Applications

Tailoring Magnetic Properties and Magnetoimpedance Response in Nanocrystalline (Fe3Ni)81Nb7B12 Ribbons for Sensor Applications

TEM, HREM, L-TEM Studies of Fe-Based Soft Magnetic Melt-Spun Ribbons Subjected to Ultra-Rapid Annealing Process

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

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