Soft magnetic properties and microstructure of novel Nb poor Finemet type alloys

Liu, H. S.; Yin, Chengze; Miao, Xiaoyu; Han, Zejun; Wang, D. H.; Du, Youwei

doi:10.1179/174328407x248523

Cited by 31 publications

(1 citation statement)

References 21 publications

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“…8 This effect of the Nb content has been confirmed in previous research. [27][28][29][30][31][32] Moreover, the increasing of the Nb content can obviously broaden the temperature interval between the two crystallizations and drastically increase the crystallization activation energy of E Tx1 and E Tx2 , resulting in easily controlling growth rates of a-Fe and the achievement of excellent soft magnetic properties and good thermal stability, which will enhance the manufacturability of the alloys.…”

Section: Resultsmentioning

confidence: 99%

Development of FeSiBNbCu Nanocrystalline Soft Magnetic Alloys with High B s and Good Manufacturability

Wan

Zhang

et al. 2016

Journal of Elec Materi

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In order to develop Fe-based nanocrystalline soft magnetic alloys with high saturation magnetic flux density (B s ) and good manufacturability, the effect of the Nb content on the thermal stability, microstructural evolution and soft magnetic properties of Fe 78Àx Si 13 B 8 Nb x Cu 1 (x = 0, 1, 2 and 3) alloys were investigated. It is found that proper Nb addition is effective in widening the optimum annealing temperature range and refining the a-Fe grain in addition to enhancing the soft magnetic properties. For the representative Fe 76 Si 13 B 8 Nb 2 Cu 1 alloy, the effective annealing time can be over 60 min in the optimal temperature range of 500-600°C. FeSiBNbCu nanocrystalline soft magnetic alloys with desirable soft magnetic properties including high B s of 1.39 T, low coercivity (H c ) of 1.5 A/m and high effective permeability (l e ) of 21,500 at 1 kHz have been developed. The enhanced soft magnetic performance and manufacturability of the FeSiBNbCu nanocrystalline alloys are attributed to the high activated energy for the precipitation of a-Fe(Si) and the second phase. These alloys with excellent performance have promising applications in electromagnetic fields like inductors.

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Section: Resultsmentioning

confidence: 99%

Development of FeSiBNbCu Nanocrystalline Soft Magnetic Alloys with High B s and Good Manufacturability

Wan

Zhang

et al. 2016

Journal of Elec Materi

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The Influence of Fe, Mn and Cr Additions on the Formation of Iron‐Rich Intermetallic Phases in an Al‐Si Die‐Casting Alloy

Fabrizi¹,

Ferraro²,

Timelli³

2014

Shape Casting: 5th International Symposium 2014

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Intermetallic Sludge Formation in Fe Containing Secondary Al–Si Alloys Influenced by Cr and Mn as Preparative Tool for Metal Melt Filtration

et al. 2017

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In view of filtration of Fe‐enriched intermetallics to decrease Fe content in secondary aluminum alloys, the formation of so‐called sludge particles has been investigated depending on dwell time and chemical composition using an AlSi9Cu3 secondary alloy with high Fe content. To evaluate the dwell time dependency, samples are cast into ceramic crucibles and held at 620 °C for varying times. Furthermore, Mn and Cr have been added to the melt in different amounts and the alloys are treated for 6 h at 620 °C. The samples are analyzed using light optical micrographs and image analysis to reveal particle sizes and distribution as well as scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and electron backscatter diffraction (EBSD) for phase identification. It is found that the growth of Fe containing sludge particles stagnates after reaching a specific value and is not significantly affected by ultra‐long dwell times. Mn addition has a minor effect on the the particle size distribution preserving large particle sizes, whereas Cr addition leads to a smaller sludge particles. Generally, the sludge consists of the cubic α‐phase. Additionally in the presence of Cr, Fe, and Cr concentration gradients occur in the cubic α–Al–(Fe,Mn,Cr)–Si phase and the Al13Cr4Si4‐phase is contained in the centers of the sludge particles. It is concluded that Mn addition is favored due to larger particle size and higher efficiency to bind Fe in the α‐phase than by Cr or Cr and Mn addition.

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Soft magnetic properties and microstructure of novel Nb poor Finemet type alloys

Cited by 31 publications

References 21 publications

Development of FeSiBNbCu Nanocrystalline Soft Magnetic Alloys with High B s and Good Manufacturability

Development of FeSiBNbCu Nanocrystalline Soft Magnetic Alloys with High B s and Good Manufacturability

The Influence of Fe, Mn and Cr Additions on the Formation of Iron‐Rich Intermetallic Phases in an Al‐Si Die‐Casting Alloy

Intermetallic Sludge Formation in Fe Containing Secondary Al–Si Alloys Influenced by Cr and Mn as Preparative Tool for Metal Melt Filtration

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