Microstructure and soft-magnetic properties of FeCoPCCu nanocrystalline alloys

Hou, Long; Fan, Xingdu; Wang, Qianqian; Yang, Weiming; Shen, Baolong

doi:10.1016/j.jmst.2019.03.030

Cited by 76 publications

(15 citation statements)

References 42 publications

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“…To highlight the exceptional high B s of (Fe 0.8 Co 0.2 ) 85 ANT alloy, we collected the existing data of Fe‐based nanocrystalline alloys (FINEMET‐type, NANOPERM‐type, HITPERM‐type, Fe‐(BSiPC)‐Cu‐type, Fe‐(BSiPC)‐type) and typical silicon steels previously reported, [ 9,11,19,27–31,40–56 ] and present these data with the mass fraction of ferromagnetic elements ( Figure a). Normally, increasing ferromagnetic element content results in higher B s and inferior GFA.…”

Section: Excellent Magnetic Propertiesmentioning

confidence: 99%

“…Summary of the excellent soft magnetic properties (e.g., B s and H c ) and thermal characteristic parameters of typical Fe‐based nanocrystalline alloys. [ 9,11,19,27–31,40–56 ] a) Variation of B s and GFA with the mass fraction of ferromagnetic element for FINEMET‐type, NANOPERM‐type, HITPERM‐type, Fe‐(BSiPC)‐Cu‐type, Fe‐(BSiPC)‐type nanocrystalline alloys, and typical silicon steels. b) Relation between maximum B s and H c value for FINEMET‐type, NANOPERM‐type, HITPERM‐type, other Cu‐free, and other Cu‐doped nanocrystalline alloys.…”

Section: Excellent Magnetic Propertiesmentioning

confidence: 99%

“…b) Relation between maximum B s and H c value for FINEMET‐type, NANOPERM‐type, HITPERM‐type, other Cu‐free, and other Cu‐doped nanocrystalline alloys. [ 9,11,19,27–31,40–56 ] c) Relation between Δ T x and T x1 values for nanocrystalline alloys with high B s exceeding 1.6 T. [ 11,27–30,40–47 ]…”

Section: Excellent Magnetic Propertiesmentioning

confidence: 99%

“…The scenario has been verified in Fe-based amorphous and nanocrystalline alloys previously reported. [12,[27][28][29][30] Therefore, an optimum proportion of Fe to Co should be determined to achieve the strongest magnetic exchange interaction in Fe-based AN alloys. Finally, in order to form a controllable nanocrystalline structure, the nucleation-promoting element of Cu and diffusioninhibiting element of V are added to control the formation, nucleation, and growth of the nanocrystals.…”

Section: Compositional Design Strategymentioning

confidence: 99%

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Exceptionally High Saturation Magnetic Flux Density and Ultralow Coercivity via an Amorphous–Nanocrystalline Transitional Microstructure in an FeCo‐Based Alloy

Zhou

Shen

et al. 2022

Advanced Materials

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High saturation magnetic flux density (Bs) of soft magnetic materials is essential for increasing the power density of modern magnetic devices and motor machines. Yet, increasing Bs is always at the expense of high coercivity (Hc), presenting a general trade‐off in the soft magnetic material family. Here, superior comprehensive soft magnetic properties, i.e., an exceptionally high Bs of up to 1.94 T and Hc as low as 4.3 A m−1 are unprecedentedly combined in an FeCo‐based alloy. This alloy is obtained through a composition design strategy to construct a transitional microstructure between amorphous and traditional nanocrystalline alloys, with nanocrystals (with < 5 nm‐sized crystal‐like regions around) sparsely dispersed in an amorphous matrix. Such transitional microstructure possesses extremely low magnetic anisotropy caused by the annihilation of quasi‐dislocation dipoles, and a strong magnetic exchange interaction, which leads to excellent comprehensive magnetic properties. The results provide useful guidelines for the development of the next generation of soft magnetic materials, which are promising for applications of high‐frequency, high‐efficiency, and energy‐saving devices.

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Section: Excellent Magnetic Propertiesmentioning

confidence: 99%

Section: Excellent Magnetic Propertiesmentioning

confidence: 99%

Section: Excellent Magnetic Propertiesmentioning

confidence: 99%

Section: Compositional Design Strategymentioning

confidence: 99%

See 2 more Smart Citations

Exceptionally High Saturation Magnetic Flux Density and Ultralow Coercivity via an Amorphous–Nanocrystalline Transitional Microstructure in an FeCo‐Based Alloy

Zhou

Shen

et al. 2022

Advanced Materials

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“…The high H c of the melt-spun ribbons is considered to originate from the internal stress caused by rapid solidification during the melt-spinning process, which can be reduced by a proper annealing process [ 30 ]. When T a is higher than T x1 , H c increases rapidly when T a is higher than T x1 , as a result of the rapid growth of α-Fe grains and the precipitation of Fe 3 (P, C, B) compounds [ 31 ]. The appropriate addition of the W element can reduce the H c values of Fe 86−x P 11 C 2 B 1 W x alloys.…”

Section: Resultsmentioning

confidence: 99%

Effect of W Addition on Fe-P-C-B Soft-Magnetic Amorphous Alloy

et al. 2022

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In this work, the thermal behavior, soft magnetic properties, and structure of Fe86−xP11C2B1Wx (x = 0, 0.1, 0.2, 0.4, 0.6, 0.8, 1, 2, and 4) amorphous alloys were researched by several experimental methods and ab initio molecular dynamics. The addition of W improved the thermal stability of the alloy system when the first onset crystallization temperature (Tx1) increased from 655 K to 711 K, significantly reduced the coercivity Hc, and decreased the saturation magnetization Bs. The Fe85.6P11C2B1W0.4 alloy showed optimal soft magnetic performance, with low Hc of 1.4 A/m and relatively good Bs of 1.52 T. The simulation results suggested that W atoms increased the distance of the neighboring Fe-Fe pair, reduced the coordination number, narrowed the gap between the spin-up and spin-down electrons of each atom, and decreased the average magnetic moment of the Fe atoms. This work demonstrates a micro-alloying strategy to greatly reduce Hc while maintaining high Bs.

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