Effect of ball milling and moderate surface oxidization on the microwave absorption properties of FeSiAl composites

Feng, Yongbao; Tang, Chuanming; Qiu, Tai

doi:10.1016/j.mseb.2013.06.004

Cited by 73 publications

(40 citation statements)

References 22 publications

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“…FeSiAl alloy is an important soft magnetic material with extensive applications, and it has been proven to exhibit potential microwave absorbing properties in gigahertz frequency region. However, it is still a big challenge for FeSiAl absorber to fulfill the requirements for high-performance microwave absorbing materials with strong absorption, broad absorption bandwidth, small thickness and light weight 21 22 23 24 25 26 27 28 . Based on the abovementioned approaches for improving magnetic absorber, the combination of FeSiAl with CNTs would be a promising method to achieve this goal.…”

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confidence: 99%

Flaky FeSiAl alloy-carbon nanotube composite with tunable electromagnetic properties for microwave absorption

Huang

Liu

Chuai

et al. 2016

Sci Rep

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Flaky FeSiAl alloy/multi-wall carbon nanotube (FeSiAl/MWCNT) composite was fabricated by facile and scalable ball milling method. The morphology and electromagnetic properties of the FeSiAl alloy can be well tuned by controlling the milling time. It is found that the magnetic loss of the FeSiAl alloy is improved by optimizing the milling time due to the increased anisotropy field. Meanwhile the addition of MWCNTs enhances the dielectric loss of the composite by increasing the interfacial polarizations, dipolar polarizations and conductive paths. Relative to conventional FeSiAl absorbers, the FeSiAl/MWCNT composite exhibits greatly improved microwave absorption performance with advantages of strong absorption and small thickness. The minimum reflection loss of the composite reaches −42.8 dB at 12.3 GHz at a very thin thickness of 1.9 mm.

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confidence: 99%

Flaky FeSiAl alloy-carbon nanotube composite with tunable electromagnetic properties for microwave absorption

Huang

Liu

Chuai

et al. 2016

Sci Rep

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“…Flaked particles are more suitable to conduct electricity and to enhance space charge polarization between metal particles. [11,18,20,21] The length to width ratio of FeSiCr nanoparticles determines the sizes of the shape anisotropy, according to Bruggeman's efficient medium theory. [16] The theory explains particle shape effects by using shape anisotropy in mixing rules.…”

Section: Resultsmentioning

confidence: 99%

Optimized Absorption Performance of FeSiCr Nanoparticles by Changing the Shape Anisotropy

Yang

Wang

Xiong

et al. 2020

Physica Status Solidi (a)

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FeSiCr nanoparticles are prepared by plasma arc discharge and ball milling processes. After ball milling, the surface area and sizes of the FeSiCr nanoparticles become larger, and most of the nanoparticles become uneven. The increasing surface area and sizes of nanoparticles contribute to the electrical conductivity, enhance the space charge polarization between metal ions, and increase the shape anisotropy of FeSiCr nanoparticles. The inhomogeneity of nanoparticles reduces the activation energy (ΔE) of the FeSiCr nanoparticles. Therefore, the complex permittivity (εnormalr) is improved, and the impedance matching is optimized. The minimum reflection loss (RLmin) of FeSiCr nanoparticles after ball milling for 6 h reaches −41.5 dB at 6.2 GHz and the effective absorbing bandwidth (RL < −10 dB) improves from 4.5 to 8.1 GHz (d = 2.2 mm). The RLmin of FeSiCr nanoparticles after ball milling for 4 h is −40.1 dB at 6.9 GHz, which is slightly less than that of the sample after ball milling for 6 h, whereas the effective absorption bandwidth (RL < −10 dB) is from 5.8 to 9.0 GHz (d = 2.2 mm). It shows that the absorption performance of FeSiCr nanoparticles can be improved by changing the shape anisotropy.

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“…As to the FePCB/graphene composite (Fig. 5 (c) [7]. Therefore, the FePCB/graphene composite with the advantages of strong absorption and small thickness can be considered as a promising candidate for high-performance microwave absorber in practical applications.…”

Section: Resultsmentioning

confidence: 99%

“…Among the candidates for EM wave absorbers, Fe-based soft magnetic metals/alloys such as Fe [4], FeNi [5], FeCo [6] and FeSiAl [7] have attracted considerable interest because of their outstanding soft magnetic properties and potential applications in highfrequency devices and micro-transductions which require high saturation magnetization, large susceptibility and high Curie temperature. However, the metal/alloy magnetic absorbers often suffer from narrow absorbing frequency bandwidth, large layer thickness, EM mismatch, easy oxidation and corrosion, which hinder their applications in absorbing EM wave.…”

Section: Introductionmentioning

confidence: 99%

Enhanced microwave absorption properties of flake-shaped FePCB metallic glass/graphene composites

Chuai

Liu

et al. 2016

Composites Part A: Applied Science and Manufacturing

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Effect of ball milling and moderate surface oxidization on the microwave absorption properties of FeSiAl composites

Cited by 73 publications

References 22 publications

Flaky FeSiAl alloy-carbon nanotube composite with tunable electromagnetic properties for microwave absorption

Flaky FeSiAl alloy-carbon nanotube composite with tunable electromagnetic properties for microwave absorption

Optimized Absorption Performance of FeSiCr Nanoparticles by Changing the Shape Anisotropy

Enhanced microwave absorption properties of flake-shaped FePCB metallic glass/graphene composites

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