Microstructure and magnetic properties of Fe72.5Cu1M2V2Si13.5B9 (M=Nb, Mo, (NbMo), (MoW)) nanocrystalline alloys

Lü, Wei; Fan, Junwei; Wang, Yuxin; Yan, Biao

doi:10.1016/j.jmmm.2010.05.008

Cited by 17 publications

(6 citation statements)

References 8 publications

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“…It follows from the Table that all alloys, with the exception of alloys with V and Cr inhibitors, have high permeability and low coercive force. For the production of nanocrystalline soft magnetic materials, Mo, W and V are also used together with Nb [84][85][86][87][88]. It is known [89] that fine grain and high permeability are obtained after holding the core at a very high temperature, more than 870 K, but for a short time, i.e., the crystallization peak should be high and narrow.…”

Section: Grain Growth Inhibitorsmentioning

confidence: 99%

Nanocrystalline Soft Magnetic Iron-Based Materials from Liquid State to Ready Product

Цепелев

Starodubtsev

2021

Nanomaterials

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The review is devoted to the analysis of physical processes occurring at different stages of production and application of nanocrystalline soft magnetic materials based on Fe–Si–B doped with various chemical elements. The temperature dependences of the kinematic viscosity showed that above a critical temperature, the viscosity of multicomponent melts at the cooling stage does not coincide with the viscosity at the heating stage. Above the critical temperature, the structure of the melt is more homogeneous, the amorphous precursor from such a melt has greater plasticity and enthalpy of crystallization and, after nanocrystallization, the material has a higher permeability. The most effective inhibitor elements are insoluble in α-Fe and form a smoothed peak of heat release during crystallization. On the other hand, the finest nanograins and the highest permeability are achieved at a narrow high-temperature peak of heat release. The cluster magnetic structure of a nanocrystalline material is the cause of magnetic inhomogeneity, which affects the shape of the magnetic hysteresis loop and core losses.

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Section: Grain Growth Inhibitorsmentioning

confidence: 99%

Nanocrystalline Soft Magnetic Iron-Based Materials from Liquid State to Ready Product

Цепелев

Starodubtsev

2021

Nanomaterials

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“…Предпринимались исследования влияния замены или изменения концентрации других компонентов сплава. Частичное замещение ниобия титаном способствует расширению температурной области существования фазы α-Fe(Si), увеличению намагниченности и уменьшению коэрцитивной силы [36], при частичной замене ниобия вольфрамом или молибденом размер нанокристаллов увеличивается [37]. Частичная замена меди на золото облегчает зарождение α-Fe(Si) фазы, уменьшая энергию активации ее кристаллизации [38], а частичная замена бора на германий приводит к увеличению доли нанокристаллической фазы [39], что способствует улучшению магнитных свойств.…”

Section: обсуждение результатовunclassified

Формирование Нанокристаллов В Аморфной Фазе Многокомпонентных Систем

Абросимова¹,

Аронин²,

Волков³

2019

Физика Твердого Тела

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The effect of the concentration of alloying components on the crystallization of amorphous (Fe_73Si_13B_9)_1 – _ x _– _ y Nb_ x Cu_ y and (Co_70Si_12B_9)_1 – _ x _– _ y Fe_ x Nb_ y alloys has been studied by X-ray diffraction and transmission electron microscopy in a wide composition region. The formation of the bcc structures in both the alloy groups is shown to be substantially dependent on the alloying component concentrations. The bcc phase is found to form in the cobalt-based alloys in the concentration region, where it was not observed before. In the cobalt-based alloys, the bcc phase appears at a niobium concentration higher than 1 at % and the average bcc nanocrystal size varies from 40 nm (at 1 at % Nb) to 14 nm (at 5 at % Nb). In the Fe-based alloys, nanocrystals with the bcc lattice form at the copper concentrations of 0.45–1 at %, and the average nanocrystal size is dependent on the alloy composition and varies in the range 16–24 nm. The causes of the concentration dependence of the formation of nanostructures in these alloys are discussed.

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“…For FeCuVSiB alloys, Mo was not as effective as Nb in limiting grain growth. [12] For Mo-doped Fe 73.5 Si 13.5 B 9 Nb 3−x Mo x Cu 1 (x = 0, 1.5, 2 and 3) alloys, when Nb was gradually replaced by Mo, the thermal stabilities of both the ferro-paramagnetic transition of the amorphous phase and the precipitation of the α -Fe 1−x Si x phase were found to deteriorate. [13] For Fe-Si-B-M-Cu (M = Nb, Mo) alloys, replacing Nb by Mo can enhance oxidation resistance.…”

Section: Introductionmentioning

confidence: 99%

“…[18] Theoretically, the effect of Mo addition on the crystallization phase should be greater than that of Nb addition, which is different from other alloys. [11][12][13][14] In this paper, Fe 40 Co 40 Zr 9−y M y B 10 Ge 1 (y = 0-4; M = Nb, Mo) amorphous alloys were prepared and annealed at their primary crystallization peak. The effects of Nb and Mo contents on the microstructure and properties of FeCoZrBGe alloys are investigated systemically and compared, to explore which element is more beneficial to microstructure and properties for the Fe 40 Co 40 Zr 9 B 10 Ge 1 alloy.…”

Section: Introductionmentioning

confidence: 99%

Effects of Nb and Mo additions on thermal behavior, microstructure and magnetic property of FeCoZrBGe alloy*

Sun¹,

Zhi-qun²,

Xu³

et al. 2021

Chinese Phys. B

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Both Nb and Mo additions play a vital role in FeCo-based alloys and it is crucial to understand their roles and contents on thermal behavior, microstructural feature and magnetic property of alloys. Nanocrystalline alloy ribbons Fe40Co40Zr9 – y M y B10Ge1 (y = 0–4; M = Nb, Mo) were prepared by crystallizing the as-quenched amorphous alloys. The effects of Nb and Mo additions on structures and properties of the Fe40Co40Zr9B10Ge1 alloy are investigated systemically and compared. With increasing Nb or Mo content, the primary crystallization temperature, grain size of α-Fe(Co) phase and coercivity H c all decrease. Moreover, the effect of Mo addition on thermal behavior, microstructure and magnetic properties of the FeCoZrBGe alloy is greater compared to Nb addition. The gap between primary and secondary crystallization peaks of Mo-containing alloys is wider than that of Nb-containing alloys. Both grain size and H c of Mo-containing alloys are smaller than those of Nb-containing alloys. For Fe40Co40Zr9B10Ge1 alloy, high Mo addition proportion is better compared to high Nb addition proportion.

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Microstructure and magnetic properties of Fe72.5Cu1M2V2Si13.5B9 (M=Nb, Mo, (NbMo), (MoW)) nanocrystalline alloys

Cited by 17 publications

References 8 publications

Nanocrystalline Soft Magnetic Iron-Based Materials from Liquid State to Ready Product

Nanocrystalline Soft Magnetic Iron-Based Materials from Liquid State to Ready Product

Формирование Нанокристаллов В Аморфной Фазе Многокомпонентных Систем

Effects of Nb and Mo additions on thermal behavior, microstructure and magnetic property of FeCoZrBGe alloy*

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