Improvement of soft magnetic properties for distinctly high Fe content amorphous alloys via longitudinal magnetic field annealing

Li, Hu; He, Aina; Wang, Anding; Xie, Lei; Li, Qiang; Zhao, Chengliang; Zhang, Guoyang; Chen, Pingbo

doi:10.1016/j.jmmm.2018.09.072

Cited by 38 publications

(12 citation statements)

References 33 publications

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“…21) It is believed that homogenous distribution of these nanocrystals can optimize the soft magnetic properties of the annealed alloy. 22) In the current study, the same feature has been achieved because rather uniform size distribution of the grown nanocrystals is observed inside the amorphous matrix after annealing [Fig. 6(b)], that improves the soft magnetic properties of the ribbons (see Figs.…”

Section: Tem Analysessupporting

confidence: 72%

Improving the soft magnetic properties of the Fe_73.5Si_13.5B₉Nb₃Cu₁ nanostructured ribbons by annealing in the hydrogen atmosphere

Nourmohammadi¹,

Fesharaki²

2018

Jpn. J. Appl. Phys.

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The nanocrystallization stage was performed in a reductive hydrogen atmosphere to prevent surface oxidation and improve the soft magnetic properties of the amorphous, Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 alloy through annealing. Both the amorphous and nanocrystalline Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 ribbons were characterized by differential scanning calorimetry, transmission electron microscopy, X-ray diffraction, alternative gradient field magnetometry, and AC susceptometry techniques. To reduce the processing cost, commercially available industrial gas sources were used at the atmospheric pressure, instead of high purity inert gas or high vacuum ambient. The surface oxidation completely stopped after using a 70% Ar-30% H 2 mixture of such gases, also the period of the nanocrystallization stage decreased. Moreover, it was observed that the soft magnetic parameters of the nanocrystalline samples depend on the annealing time. Both the in-plane permeability and coercive field of the ribbons improved through nanocrystallization and the optimum annealing time was determined.

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Section: Tem Analysessupporting

confidence: 72%

Improving the soft magnetic properties of the Fe_73.5Si_13.5B₉Nb₃Cu₁ nanostructured ribbons by annealing in the hydrogen atmosphere

Nourmohammadi¹,

Fesharaki²

2018

Jpn. J. Appl. Phys.

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“…The H c of Fe-based amorphous alloys is directly related to the inhomogeneity, internal stress, and free volume of amorphous alloys [ 5 , 6 , 7 , 8 ]. In order to reduce H c and improve the soft magnetic properties, annealing is generally carried out near or above the Curie temperature ( T C ) of amorphous alloys [ 5 , 9 ]. Above T C , amorphous alloys are paramagnetic, so the stress release and structural relaxation are no longer affected by the local internal magnetic field [ 5 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…In order to reduce H c and improve the soft magnetic properties, annealing is generally carried out near or above the Curie temperature ( T C ) of amorphous alloys [ 5 , 9 ]. Above T C , amorphous alloys are paramagnetic, so the stress release and structural relaxation are no longer affected by the local internal magnetic field [ 5 , 9 , 10 ]. Therefore, the magnetic domain structure is optimized, thus greatly improving the soft magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of Annealing Process on Soft Magnetic Properties of Fe-B-C-Si-P Amorphous Alloys

Jia,

Wu,

Shi

et al. 2024

Materials

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It is well known that the annealing process plays a key role in tuning the properties of Fe-based amorphous soft magnetic alloys. However, the optimal annealing process for a particular amorphous alloy is often difficult to determine. Here, Fe81.4B13.2C2.8Si1.8P0.8 and Fe82.2B12.4C2.8Si1.8P0.8 amorphous alloys (denoted as Fe81.4 and Fe82.2) were prepared to systematically study the effects of the annealing temperature and time on the soft magnetic properties. The results show that the optimum annealing temperature ranges of the Fe81.4 and Fe82.2 amorphous alloys were 623 K to 653 K and 593 K to 623 K, and their coercivity (Hc) values were only 2.0–2.5 A/m and 1.3–2.7 A/m, respectively. Furthermore, a characteristic temperature Tai was obtained to guide the choosing of the annealing temperature at which the dBs/dT begins to decrease rapidly. Based on the theory of spontaneous magnetization, the relationship between Tai and the optimum annealing temperature ranges was analyzed. When the annealing temperature was higher than Tai, the effect of the internal magnetic field generated by spontaneous magnetization on the relaxation behavior was significantly reduced, and the alloys exhibited excellent soft magnetic properties. It is worth indicating that when annealed at 603 K (slightly higher than Tai), the Fe82.2 amorphous alloys exhibited excellent and stable soft magnetic properties even if annealed for a long time. The Hc of Fe82.2B12.4C2.8Si1.8P0.8 amorphous alloys was only 1.9 A/m when annealed at 603 K for 330 min. This value of Tai is expected to provide a suggestion for the proper annealing temperature of other amorphous soft magnetic alloys.

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“…Based on comprehensive considerations of durability and stability of the materials, it is surprisingly found that research studies on Cu-based MG ribbons have been focusing on their much higher degradation efficiency and faster reaction rate for organic dyes compared to other types of MGs after many cyclic tests. , Nevertheless, the weak surface decay emerges from the materials, and more or less active substances for Cu-based nanocomposites are deposited on the surface of these materials to further lead to a slight loss of quality. Additionally, it is well believed that the tiny nanocrystals formed by the annealing treatment can improve the mechanical properties , and soft magnetic performance , of MG materials. Therefore, in order to solve the loss of the active substances, the internal structure of material will be adjusted by heat treatment process to further inhibit the excessive precipitation of nanocomposites on the surface of ribbons under the premise of good catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Copper Nanocomposites In Situ Formed from Metallic Glasses for an Efficient Catalytic Performance

Zhao

Zeng

et al. 2022

ACS Appl. Mater. Interfaces

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Metallic glasses (MGs) with the unique long-range disordered and short-range ordered atomic structure have attracted extensive attention in the field of environmental catalysis due to their advanced catalytic capability. Herein, CuZr-based MGs are first proven to exhibit superior catalytic performance toward the degradation of organic pollutants compared to the annealed ribbons with different crystal structures; many Cu nanocomposites are gradually in situ precipitated on the surface of the ribbons. The enhanced catalytic behavior is mainly attributed to the random atomic packing structure accelerating electron transport and providing sufficient active sites. On the other hand, the active species, for example, •OH, •O 2 − , and Cu(III), are generated through an activation reaction between Cu/Cu 2 O nanocomposites and H 2 O 2 molecules for the catalytic degradation process. Additionally, further investigation indicated that CuZr-based MGs also present superior stability and durability along with an approximate 96% degradation efficiency within 10 min at the 10th run. This research can successfully explain why MGs have a little higher catalytic reactivity than their crystalline counterparts, and more importantly, it will provide a new strategy for the preparation of catalytic materials for wastewater treatment.

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Improvement of soft magnetic properties for distinctly high Fe content amorphous alloys via longitudinal magnetic field annealing

Cited by 38 publications

References 33 publications

Improving the soft magnetic properties of the Fe_73.5Si_13.5B₉Nb₃Cu₁ nanostructured ribbons by annealing in the hydrogen atmosphere

Improving the soft magnetic properties of the Fe_73.5Si_13.5B₉Nb₃Cu₁ nanostructured ribbons by annealing in the hydrogen atmosphere

Influence of Annealing Process on Soft Magnetic Properties of Fe-B-C-Si-P Amorphous Alloys

Copper Nanocomposites In Situ Formed from Metallic Glasses for an Efficient Catalytic Performance

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Improvement of soft magnetic properties for distinctly high Fe content amorphous alloys via longitudinal magnetic field annealing

Cited by 38 publications

References 33 publications

Improving the soft magnetic properties of the Fe73.5Si13.5B9Nb3Cu1 nanostructured ribbons by annealing in the hydrogen atmosphere

Improving the soft magnetic properties of the Fe73.5Si13.5B9Nb3Cu1 nanostructured ribbons by annealing in the hydrogen atmosphere

Influence of Annealing Process on Soft Magnetic Properties of Fe-B-C-Si-P Amorphous Alloys

Copper Nanocomposites In Situ Formed from Metallic Glasses for an Efficient Catalytic Performance

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Improving the soft magnetic properties of the Fe_73.5Si_13.5B₉Nb₃Cu₁ nanostructured ribbons by annealing in the hydrogen atmosphere

Improving the soft magnetic properties of the Fe_73.5Si_13.5B₉Nb₃Cu₁ nanostructured ribbons by annealing in the hydrogen atmosphere