The study on order behavior and electronic structure of flaky FeSiAl powder

Niu, Xiaofei

doi:10.1016/j.jmmm.2019.165725

Cited by 8 publications

(3 citation statements)

References 21 publications

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“…Fe, Si and Al atoms randomly occupy positions, resulting in BCC structure [29]. While, the main location of Al and Si atoms at body center position leads to DO3 superlattice structure [29]. In the previous reports, due to internal stress, DO3 phase could transform to disorder phase during milling process [30].…”

Section: Resultsmentioning

confidence: 94%

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Tailored microwave absorption performance through interface evolution by in-situ reduced Fe nanoparticles on the surface of FeSiAl microflake

Shi,

Liu,

Cheng

et al. 2023

Phys. Scr.

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Poor impedance matching and low-frequency magnetic resonance are great challenge for Fe-based micron-scale materials as microwave absorber in GHz range. Here, we propose in-situ interface engineer strategy for tailoring the interface through in-situ reduced Fe nanoparticles and introduce planar anisotropy for flattening particles with high aspect ratio during high-energy vertical ball milling process, which can synchronously enhance impedance matching and exceed Snoke’s limit. With increasing milling time, the interface experiences the following in-situ evolution: the nano oxide layer-micro particles interface, the partial interface between nano oxide layer and Fe nanoparticles, the integrity Fe nanoparticles-oxide layer interface, the nano oxide layer-microflake interface. Meanwhile, the aspect ratio is up to 74.93. The evolution of interface and high aspect ratio can effectively tailor permittivity and permeability. Due to the novel microstructure that FeSiAl flake are covered by ~ 30 nm oxide layer containing ~ 10 nm Fe nanoparticles, natural resonance induced by planar anisotropy, eddy current loss of metallic microflake, relaxation loss induced by interface polarization, conductive loss from electric resistivity together led to good microwave absorption performance (effective absorbing bandwidth of 3.12 GHz at 3.2 mm and minimal reflection loss of -44.47 dB at 7.44 GHz and 3.3 mm). The present finding might highlight for developing the composite absorbers with multi loss type coupling across nano-micro scales.

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Section: Resultsmentioning

confidence: 94%

“…In addition, the appearance of (111) plane reveals the formation of DO3 superlattice structure, which is conducive to increasing μ r [13]. Fe, Si and Al atoms randomly occupy positions, resulting in BCC structure [29]. While, the main location of Al and Si atoms at body center position leads to DO3 superlattice structure [29].…”

Section: Resultsmentioning

confidence: 99%

Tailored microwave absorption performance through interface evolution by in-situ reduced Fe nanoparticles on the surface of FeSiAl microflake

Shi,

Liu,

Cheng

et al. 2023

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…To obtain flake powders from nanocrystalline alloy sheets through ball milling, the sheets must be crushed and plastically deformed. Even in brittle materials (e.g., metallic glass and intermetallic), particles can be deformed plastically into platelet shape by ball-mill treatment using a process control agent (PCA), such as an organic solvent or oil, which controls the surface energy on the particles ( Koch and Whittenberger, 1996 ; Niu, 2020 ). The effects of ball milling on the structure and magnetic properties of soft ferromagnetic metallic glasses have been widely studied ( He et al., 1995 ; Bednarcik et al., 2004 ; Ramasamy et al., 2017 ).…”

Section: Introductionmentioning

confidence: 99%