Atomic level structural modulation during the structural relaxation and its effect on magnetic properties of Fe81Si4B10P4Cu1 nanocrystalline alloy

Cao, C.C.; Zhu, Liya; Yang, Meng; Zhai, Xiurong; Wang, Y.G.

doi:10.1016/j.jmmm.2018.02.043

Cited by 13 publications

(3 citation statements)

References 30 publications

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“…Among several groups of soft magnetic materials, Fe-based amorphous and nanocrystalline alloys are extremely interesting from both a scientific and an application point of view [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. They exhibit not only optimal soft magnetic properties (e.g., low coercivity (H c ) and high permeability (µ')) but also are characterized by relatively low magnetic core losses (P s ) in comparison with other materials.…”

Section: Introductionmentioning

confidence: 99%

Fe-Co-B Soft Magnetic Ribbons: Crystallization Process, Microstructure and Coercivity

et al. 2020

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In this work, a detailed microstructural investigation of as-melt-spun and heat-treated Fe67Co20B13 ribbons was performed. The as-melt-spun ribbon was predominantly amorphous at room temperature. Subsequent heating demonstrated an amorphous to crystalline α-(Fe,Co) phase transition at 403 °C. In situ transmission electron microscopy observations, carried out at the temperature range of 25–500 °C and with the heating rate of 200 °C/min, showed that the first crystallized nuclei appeared at a temperature close to 370 °C. With a further increase of temperature, the volume of α-(Fe,Co) crystallites considerably increased. Moreover, the results showed that a heating rate of 200 °C/min provides for a fine and homogenous microstructure with the α-(Fe,Co) crystallites size three times smaller than when the ribbon is heated at 20 °C/min. The next step of this research concerned the influence of both the annealing time and temperature on the microstructure and coercivity of the ribbons. It was shown that annealing at 485 °C for a shorter time (2 s) led to materials with homogenous distribution of α-(Fe,Co) crystallites with a mean size of 30 nm dispersed in the residual amorphous matrix. This was reflected in the coercivity (20.5 A/m), which significantly depended on the volume fraction of crystallites, their size, and distribution.

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Section: Introductionmentioning

confidence: 99%

Fe-Co-B Soft Magnetic Ribbons: Crystallization Process, Microstructure and Coercivity

et al. 2020

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“…31−33 The low solubility of Cu−P atomic pairs in iron, which comes from the coeffect of the positive mixing enthalpy of the Fe−Cu pair (+13 kJ/mol) and the negative mixing enthalpy of the Cu−P pair (−9 kJ/ mol), induces chemical heterogeneity in the amorphous matrix and provides nucleation precursors for α-Fe, which is beneficial to the refinement of nanocrystalline grains during annealing. 34,35 As discussed above, the chemical inhomogeneity induced by Cu−P pairs can promote the formation of galvanic cell structures in the alloy; thus, the degradation performance of FeSiBPCu amorphous alloys should be promising. Furthermore, there is disagreement about the effect of structural heterogeneity induced through annealing in Febased amorphous alloys on dye degradation efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, Fe 83.3–84.3 Si 4 B 8 P 3–4 Cu 0.7 amorphous alloys have attracted a lot of research attention, as their nanocrystalline counterparts possess a high B s of 1.88–1.9 T and a low H c of 7–10 Am –1 and are considered as promising Fe-based soft magnetic materials. − The low solubility of Cu–P atomic pairs in iron, which comes from the coeffect of the positive mixing enthalpy of the Fe–Cu pair (+13 kJ/mol) and the negative mixing enthalpy of the Cu–P pair (−9 kJ/mol), induces chemical heterogeneity in the amorphous matrix and provides nucleation precursors for α-Fe, which is beneficial to the refinement of nanocrystalline grains during annealing. , As discussed above, the chemical inhomogeneity induced by Cu–P pairs can promote the formation of galvanic cell structures in the alloy; thus, the degradation performance of FeSiBPCu amorphous alloys should be promising.…”

Section: Introductionmentioning

confidence: 99%

Competitive Effects of Structural Heterogeneity and Surface Chemical States on Catalytic Efficiency of FeSiBPCu Amorphous and Nanocrystalline Alloys

Wang

Chen

et al. 2018

ACS Appl. Nano Mater.

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The competitive effects of structural heterogeneity and surface chemical states on the catalytic efficiency of FeSiBPCu amorphous, single nanocrystalline, and multiple crystalline ribbons toward methylene blue (MB) degradation via Fenton-like reactions are studied. The FeSiBPCu amorphous and single nanocrystalline ribbons show higher catalytic efficiency than their multiple crystalline counterpart and FeSiB amorphous alloy. There are more Fe0 and galvanic cell structures on the surfaces of FeSiBPCu single nanocrystalline ribbons than those of FeSiBPCu amorphous ribbons. However, the amorphous and single nanocrystalline ribbons show similar catalytic performance due to the passive iron phosphate and silica layer formed on the surfaces of FeSiBPCu single nanocrystalline ribbons during annealing. Formation of Fe3P0.37B0.63 and enrichment of iron phosphates and silica on the surface reduces the catalytic efficiency of FeSiBPCu multiple crystalline ribbons. The dye degrading process finishes within 30 min using FeSiBPCu amorphous ribbons even after 20 recycles. This work clarifies the competitive effects of structural heterogeneity and change of surface chemical states induced by annealing on the catalytic efficiency of FeSiBPCu amorphous ribbons.

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Effect of P/B ratio on the thermal stability, soft magnetic properties and magnetostriction properties of Fe80B14−xPxSi5C1 amorphous alloys

Yan,

Lu,

Chen

et al. 2024

J Mater Sci: Mater Electron

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Atomic level structural modulation during the structural relaxation and its effect on magnetic properties of Fe81Si4B10P4Cu1 nanocrystalline alloy

Cited by 13 publications

References 30 publications

Fe-Co-B Soft Magnetic Ribbons: Crystallization Process, Microstructure and Coercivity

Fe-Co-B Soft Magnetic Ribbons: Crystallization Process, Microstructure and Coercivity

Competitive Effects of Structural Heterogeneity and Surface Chemical States on Catalytic Efficiency of FeSiBPCu Amorphous and Nanocrystalline Alloys

Effect of P/B ratio on the thermal stability, soft magnetic properties and magnetostriction properties of Fe80B14−xPxSi5C1 amorphous alloys

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