BCC nanocrystal formation in an amorphous Co-Si-B-Fe-Nb alloy on heating

Abrosimova, G. E.; Volkov, N. A.; Орлова, Н. Н.; Аронин, А. С.

doi:10.1016/j.matlet.2018.02.069

Cited by 14 publications

(9 citation statements)

References 12 publications

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“…In this respect, Fe-based and Co-based amorphous alloys have good soft magnetic properties such as high permeability and low core loss due to random magnetic anisotropy and exhibit high strength and corrosion resistance [1,8,9]. In addition, replacing the Co with the Fe improves the saturation magnetization (M s ) according to the Slater-Pauling curve [10].…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, the (Fe, Co)-B-Si alloy system, in which metalloid elements were added to improve GFA and expand the supercooling region, was developed in 1974 and had excellent soft magnetic properties and high strength compared to other Fe-B-Si systems [16][17][18]. However, since B and Si reduce the magnetic moment of the material [4,19], adding a small amount of Nb that does not reduce soft magnetic properties to replace metalloids (Si and B) in Fe-Co amorphous alloys can lead to good GFA and thermal stability through its low diffusion coefficient and the formation of network-like atomic configurations [9,15,20,21]. Furthermore, recent studies have shown that Fe-Co-B-Si-Nb alloys also possess other advantageous properties.…”

Section: Introductionmentioning

confidence: 99%

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Annealing Effect in Amorphous Fe-Co-B-Si-Nb According to Fe/Co Ratio

Son

Park

Lee

et al. 2023

Metals

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These days, electric motor qualities and energy-saving problems are significant to our society. The critical component of these problems is related to magnetic materials. In this respect, here, we investigated the (FexCo1−x)72B19.2Si4.8Nb4 (0 ≤ x ≤ 1, at 0.1 intervals) ribbon alloys’ structural, thermal, and magnetic properties. Replacing Co with Fe turned out to increase saturation magnetization up to 127.7 emu/g and improve thermal stability. Also, we conducted heat treatment at 843, 893, and 943 K for 10 mins, and the annealing effect in the amorphous (FexCo1−x)72B19.2Si4.8Nb4 (0.4 ≤ x ≤ 0.9, at 0.1 intervals) ribbons on structural and magnetic properties are analyzed. The saturated magnetization (Ms) value has increased by about 20 to 30 emu/g by the heat treatment and tends to increase as the annealing temperature increases until the annealing temperature approaches 893 K. After annealing at 943 K for 10 mins, the highest saturation magnetization of 156.8 emu/g was achieved. In addition, all four samples show the same coercivity trend. The coercivity decreases when the initial heat treatment at 843 K is applied to the ribbons. However, after annealing at this high temperature, such as 893, 943 K, the Fe3B, and (Fe, Co)23B6 phases are also generated and cancel out the good soft magnetic properties of α-(Fe, Co) phase.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Annealing Effect in Amorphous Fe-Co-B-Si-Nb According to Fe/Co Ratio

Son

Park

Lee

et al. 2023

Metals

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“…Одним из наиболее часто используемых методов является контролируемая кристаллизация аморфной фазы, которая осуществляется с помощью термической обработки. Поскольку не все аморфные сплавы кристаллизуются с образованием нанокристаллов при термообработке, в сплав добавляют легирующие компоненты, которые способствуют увеличению скорости зарождения кристаллов и уменьшению скорости их роста [17][18][19][20]. Первым нанокристаллическим сплавом, полученным таким образом, был сплав Fe-Si-B, легированный Cu и Nb, получивший название Finemet (Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 ) [21].…”

Section: Introductionunclassified

Структура и магнитные свойства аморфных и нанокристаллических сплавов Co-Fe-B-(Nb, Ti)

Чиркова¹,

Волков²,

Шолин³

et al. 2022

Физика Твердого Тела

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The structure and magnetic properties of amorphous and nanocrystalline Co56Fe16B20X8 (X = Nb, Ti) alloys have been studied by X-ray diffraction and vibrating sample magnetometry. It is shown that the saturation magnetization of the amorphous Co56Fe16B20Ti8 alloy is higher than that of the Co56Fe16B20Nb8 alloy. The temperature dependence of the saturation magnetization of amorphous alloys is measured and it is shown that the saturation magnetization of the Co56Fe16B20Ti8 alloy decreases with temperature more slowly than the magnetization of the Co56Fe16B20Nb8 alloy. Crystallization of amorphous alloys leads to a decrease in the saturation magnetization of both alloys. During crystallization, BCC nanocrystals are formed in the Co56Fe16B20Nb8 alloy and multiphase structure is formed in the Co56Fe16B20Ti8 alloy.

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“…One of the most commonly used methods is the controlled crystallization of the amorphous phase, which is carried out using heat treatment. Since not all amorphous alloys crystallize with the formation of nanocrystals during heat treatment, alloying components are added to the alloy, which increase the rate of crystal nucleation and decrease the rate of their growth [17][18][19][20]. The first nanocrystalline alloy produced in this way was an Fe-Si-B alloy alloyed with Cu and Nb, called Finemet (Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 ) [21].…”

Section: Introductionmentioning

confidence: 99%

Structure and magnetic properties of amorphous and nanocrystalline Co-Fe-B-(Nb, Ti) alloys

Chirkova

Volkov

Sholin

et al. 2022

Physics of the Solid State

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The structure and magnetic properties of amorphous and nanocrystalline Co56Fe16B20X8 (X=Nb, Ti) alloys have been studied by X-ray diffraction and vibrating sample magnetometry. It is shown that the saturation magnetization of the amorphous Co56Fe16B20Ti8 alloy is higher than that of the Co56Fe16B20Ti8 alloy. The temperature dependence of the saturation magnetization of amorphous alloys is measured and it is shown that the saturation magnetization of the Co56Fe16B20Ti8 alloy decreases with temperature more slowly than the magnetization of the Co56Fe16B20Nb8 alloy. Crystallization of amorphous alloys leads to a decrease in the saturation magnetization of both alloys. During crystallization, BCC nanocrystals are formed in the Co56Fe16B20Nb8 alloy and multiphase structure is formed in the Co56Fe16B20Ti8 alloy. Keywords: amorphous phase, crystallization, nanocrystals, magnetic properties.

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BCC nanocrystal formation in an amorphous Co-Si-B-Fe-Nb alloy on heating

Cited by 14 publications

References 12 publications

Annealing Effect in Amorphous Fe-Co-B-Si-Nb According to Fe/Co Ratio

Annealing Effect in Amorphous Fe-Co-B-Si-Nb According to Fe/Co Ratio

Структура и магнитные свойства аморфных и нанокристаллических сплавов Co-Fe-B-(Nb, Ti)

Structure and magnetic properties of amorphous and nanocrystalline Co-Fe-B-(Nb, Ti) alloys

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