In situ construction of complex spinel ferrimagnet in multi-elemental alloy for modulating natural resonance and highly efficient electromagnetic absorption

Liu, Xiaoji; Duan, Yuping; Guo, Yuan; Li, Zerui; Ma, Jiabin; Di, Jingru; Wang, Tongmin

doi:10.1016/j.cej.2023.142200

Cited by 15 publications

(4 citation statements)

References 53 publications

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“…As the carbonitriding degree increased, both samples #CN20 and #CN40 exhibited significant differences with the initial oxidation temperature appearing at 340 °C and ending at 831 °C, and the final oxidation weight gain significantly decreasing to 126.51 and 123.73%, respectively. Therefore, the carbonitriding treatment retarded the oxidation rates since the strong ionic bonding between metals and nonmetal elements (C, N) prevented the diffusion of oxygen atoms into the interior of HEAs …”

Section: Resultsmentioning

confidence: 99%

“…Due to their unique microstructure and multiprincipal components, HEAs demonstrate substantial benefits in enhancing dielectric loss, fostering high-frequency magnetic loss, and enhancing impedance matching. Usually, the permeability of EMA materials is significantly less than the permittivity, and enhancing the permeability is the key to improving impedance matching and achieving excellent EMA performances. − The high resistivity resulting from the severe lattice distortion effect of HEAs can help to reduce the complex permittivity to enhance impedance matching and EMA efficacy. − …”

Section: Introductionmentioning

confidence: 99%

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Efficient and Homogeneous Carbonitriding of High-Entropy Alloys by a Mechanochemical Process for Obtaining Coordinated Electromagnetic Matching

Jia,

Jiang,

et al. 2023

ACS Appl. Mater. Interfaces

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient and Homogeneous Carbonitriding of High-Entropy Alloys by a Mechanochemical Process for Obtaining Coordinated Electromagnetic Matching

Jia,

Jiang,

et al. 2023

ACS Appl. Mater. Interfaces

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“…Although there are unpredictable mechanisms that occur, such as Snoek's limit, etc., resulting in minor errors between the calculated and measured EM parameters at high frequencies, the effective absorption calculation result is close to the measurement result, and the measured NiF (denoted NiF-GMA) shows an EAB of 8.55 GHz (9.44−18.0 GHz, Figure 4d). Since EM parameters for achieving effective absorption are over a wide range 47 and there are minor errors in the EM parameters, the predicted effective absorption frequency range is close to the experimental results. Taking the sample thickness as an additional variable, the design space of NiF is further broadened.…”

Section: Overall Optimizationmentioning

confidence: 99%

Performance Optimization Engineering of Multicomponent Absorbing Materials Based on Machine Learning

Wang

Huang

Yan

et al. 2023

ACS Appl. Mater. Interfaces

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Multicomponent materials are microwave-absorbing (MA) materials composed of a variety of absorbents that are capable of reaching the property inaccessible for a single component. Discovering mostly valuable properties, however, often relies on semi-experience, as conventional multicomponent MA materials’ design rules alone often fail in high-dimensional design spaces. Therefore, we propose performance optimization engineering to accelerate the design of multicomponent MA materials with desired performance in a practically infinite design space based on very sparse data. Our approach works as a closed-loop, integrating machine learning with the expanded Maxwell–Garnett model, electromagnetic calculations, and experimental feedback; aiming at different desired performances, Ni surface@carbon fiber (NiF) materials and NiF-based multicomponent (NMC) materials with target MA performance were screened and identified out of nearly infinite possible designs. The designed NiF and NMC fulfilled the requirements for the X- and Ku-bands at thicknesses of only 2.0 and 1.78 mm, respectively. In addition, the targets regarding S, C, and all bands (2.0–18.0 GHz) were also achieved as expected. This performance optimization engineering opens up a unique and effective way to design microwave-absorbing materials for practical application.

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“…Electromagnetic wave absorbing materials (EAMs) have emerged as a key technology in EM defense, owing to their ability to absorb EM waves and convert them into thermal energy [9][10][11]. Depending on the mechanism of EM wave loss, EAMs can be categorized into three main types: dielectric loss materials [12,13], magnetic loss materials [14,15], and materials that exhibit both types of losses [16,17]. EAMs are capable of absorbing EM waves over a broad frequency range by adjusting the EM parameters to achieve a suitable impedance match and loss constant [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Impedance mismatch derived coded absorbing materials: for ultra-broadband anti-reflection and scattering field tailored on demand

Chen

Duan

Liu

et al. 2023

Preprint

Self Cite

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The inability of existing electromagnetic wave absorbing materials (EAMs) to manipulate electromagnetic waves in multiple dimensions leads to the failure to satisfy the demands placed on electromagnetic (EM) defense technology by the current complex EM environment. To break this dilemma, this study focuses on the impedance properties of EAMs, conferring additional ability to disperse and deflect reflected waves by encoding EAMs with opposite phase responses in different impedance mismatch modes. Due to the synergy of both absorption and scattering mechanisms, the developed scattering metasurface absorber exhibits excellent anti-reflection performance, with reflectivity below 0.1 in the 7.8-16.7 GHz at 2 mm thickness. Furthermore, a genetic algorithm is employed to tailor the desired scattering field to meet the stealth requirements of specific environments, allowing for the directional transmission of EM energy in the one-dimensional or homogeneous distribution in the three-dimensional. The proposed scattering metasurface absorber constructed by coded EAMs exhibited excellent anti-reflection properties and environmental stealth adaptability, opening up new possibilities for the development of advanced EM defense technology.

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In situ construction of complex spinel ferrimagnet in multi-elemental alloy for modulating natural resonance and highly efficient electromagnetic absorption

Cited by 15 publications

References 53 publications

Efficient and Homogeneous Carbonitriding of High-Entropy Alloys by a Mechanochemical Process for Obtaining Coordinated Electromagnetic Matching

Efficient and Homogeneous Carbonitriding of High-Entropy Alloys by a Mechanochemical Process for Obtaining Coordinated Electromagnetic Matching

Performance Optimization Engineering of Multicomponent Absorbing Materials Based on Machine Learning

Impedance mismatch derived coded absorbing materials: for ultra-broadband anti-reflection and scattering field tailored on demand

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