Synthesis of FeCoNiCuZn single-phase high-entropy alloy by high-frequency electromagnetic-field assisted ball milling

Yingzhe, Zhang; Chen, Yudao; Qin, Qingdong; Li, Wei

doi:10.1016/j.jmmm.2019.166151

Cited by 27 publications

(6 citation statements)

References 29 publications

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“…Whereas the coercivity ( H c ) and remanent magnetization ( M r ) (Fig. 5 b) for these films were found to be 19.5 Oe and 1.17% respectively, revealing superior magnetic properties when compared to existing reports on the same system 10 . The soft magnetic behaviour with relatively low H c and low M r of HEA thin films can be attributed to the crystalline nature of the films.…”

Section: Resultsmentioning

confidence: 55%

“…combined with desired excellent structural properties. Very recently FeCoNiCuZn high entropy alloy system has been reported by ball milling 9 , 10 . In addition, the development of HEAs with a new set of elements having three distinct crystal structures and large variation in their melting points (low melting point element such as Zn), in the form of bulk or thin films have not been explored except ball milling due to the difficulty faced during conventional high temperature alloy making methods.…”

Section: Introductionmentioning

confidence: 99%

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An advancement in the synthesis of unique soft magnetic CoCuFeNiZn high entropy alloy thin films

Pavithra

Janardhana

Reddy

et al. 2021

Sci Rep

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Discovery of advanced soft-magnetic high entropy alloy (HEA) thin films are highly pursued to obtain unidentified functional materials. The figure of merit in current nanocrystalline HEA thin films relies in integration of a simple single-step electrochemical approach with a complex HEA system containing multiple elements with dissimilar crystal structures and large variation of melting points. A new family of Cobalt–Copper–Iron–Nickel–Zinc (Co–Cu–Fe–Ni–Zn) HEA thin films are prepared through pulse electrodeposition in aqueous medium, hosts nanocrystalline features in the range of ~ 5–20 nm having FCC and BCC dual phases. The fabricated Co–Cu–Fe–Ni–Zn HEA thin films exhibited high saturation magnetization value of ~ 82 emu/g, relatively low coercivity value of 19.5 Oe and remanent magnetization of 1.17%. Irrespective of the alloying of diamagnetic Zn and Cu with ferromagnetic Fe, Co, Ni elements, the HEA thin film has resulted in relatively high saturation magnetization which can provide useful insights for its potential unexplored applications.

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Section: Resultsmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

An advancement in the synthesis of unique soft magnetic CoCuFeNiZn high entropy alloy thin films

Pavithra

Janardhana

Reddy

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…In the case of multielement or HEAs, materials were tested for the EM wave absorption properties. [179,180] Yang et al ( 2016) [181] studied the FeCoNiCrAl alloy EM radiation absorption efficiency in the frequency range 2-18 GHz. The ball-milled prepared highentropy-alloy materials introduced many defects during processing, and these defects act as a polarized center.…”

Section: Integrating Thermally Sprayed Coatings With Multicomponent A...mentioning

confidence: 99%

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

et al. 2022

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This review aims to consolidate scattered literature on thermally sprayed coatings with nonionizing electromagnetic (EM) wave absorption and shielding over specific wavelengths potentially useful in diverse applications (e.g., microwave to millimeter wave, solar selective, photocatalytic, interference shielding, thermal barrier‐heat/emissivity). Materials EM properties such as electric permittivity, magnetic permeability, electrical conductivity, and dielectric loss are critical due to which a material can respond to absorbed, reflected, transmitted, or may excite surface electromagnetic waves at frequencies typical of electromagnetic radiations. Thermal spraying is a standard industrial practice used for depositing coatings where the sprayed layer is formed by successive impact of fully or partially molten droplets/particles of a material exposed to high or moderate temperatures and velocities. However, as an emerging novel application of an existing thermal spray techniques, some special considerations are warranted for targeted development involving relevant characterization. Key potential research areas of development relating to material selection and coating fabrication strategies and their impact on existing practices in the field are identified. The study shows a research gap in the feedstock materials design and doping, and their complex selection covered by thermally sprayed coatings that can be critical to advancing applications exploiting their electromagnetic properties.

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“…[ 3 , 4 , 5 , 6 , 7 ], dielectric loss type (ferroelectric ceramics, MnO 2 , etc. ), and magnetic loss type (ferrite [ 8 , 9 , 10 , 11 ], carbonyl iron [ 12 , 13 , 14 , 15 , 16 ], magnetic metal alloy powder [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ], etc.). Magnetic alloy powders have been widely studied for their high absorption intensity and wide absorption band.…”

Section: Introductionmentioning

confidence: 99%

“…Lan et al [ 24 ] prepared FeCoNiCrCuAl hollow high-entropy alloy powder with an RL min of −40.2 dB and a Δ f RL <−10 dB of 4.48 GHz. Zhang et al [ 25 ] obtained a high-entropy FeCoNiCuZn alloy powder with an RL min of −14.69 dB and a Δ f RL <−10 dB of 2.5 GHz. The existing materials cannot have both strong absorption and a wide frequency band; therefore, studies should be focused on the development of new absorbing materials.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Electromagnetic Absorption Properties of Fe73.2Si16.2B6.6Nb3Cu1 Nanocrystalline Powder

Zhou

et al. 2022

Materials

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In order to decrease and control electromagnetic pollution, absorbing materials with better electromagnetic wave absorption properties should be developed. In this paper, a nanocrystalline alloy ribbon with the composition of Fe73.2Si16.2B6.6Nb3Cu1 was designed and prepared. Nanocrystalline alloy powder was obtained by high-energy ball milling treatment. The effects of ball milling time on the soft magnetic properties, microstructure, morphology, and electromagnetic wave absorption properties of alloy powder were investigated. The results showed that, as time increased, α-(Fe, Si) gradually transformed into the amorphous phase, and the maximum saturation magnetization (Ms) reached 135.25 emu/g. The nanocrystalline alloy powder was flakelike, and the minimum average particle size of the powder reached 6.87 μm. The alloy powder obtained by ball milling for 12 h had the best electromagnetic absorption performance, and the minimum reflection loss RLmin at the frequency of 6.52 GHz reached −46.15 dB (matched thickness was 3.5 mm). As time increased, the best matched frequency moved to the high-frequency direction, and the best matched thickness decreased, while the maximum effective absorption bandwidth ΔfRL<−10 dB was 7.22 GHz (10.78–18 GHz).

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Synthesis of FeCoNiCuZn single-phase high-entropy alloy by high-frequency electromagnetic-field assisted ball milling

Cited by 27 publications

References 29 publications

An advancement in the synthesis of unique soft magnetic CoCuFeNiZn high entropy alloy thin films

An advancement in the synthesis of unique soft magnetic CoCuFeNiZn high entropy alloy thin films

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

Preparation and Electromagnetic Absorption Properties of Fe73.2Si16.2B6.6Nb3Cu1 Nanocrystalline Powder

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