Electromagnetic wave absorption properties for FeCoNiCr alloy powders with magnetic field heat treatment

Yang, Peipei; Li, Ying; Zhao, Xiuchen; Zhang, Cong

doi:10.1007/s10854-017-6741-9

Cited by 16 publications

(6 citation statements)

References 19 publications

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“…Liu et al annealed the FeCoNiCr HEA powders under magnetic field. [27] Compared with the situation without magnetic field, the stable phase tended to precipitate out in the HEAs with a high magnetic field. Beyond that, magnetic field could offer favorable conditions to stabilize the austenite phase.…”

Section: Magnetic Controllingmentioning

confidence: 96%

“…They found that an acceleration of atomic diffusion was caused by applying magnetic field, which facilitated coarsening of the secondary phase on the grain boundary. Liu et al annealed the FeCoNiCr HEA powders under magnetic field 27. Compared with the situation without magnetic field, the stable phase tended to precipitate out in the HEAs with a high magnetic field.…”

Section: Phase Engineering Of Heasmentioning

confidence: 99%

“…Second, strain suppresses the magnetic moment, modulates dislocation glide, and induces the phase transition of metastable phase. Additionally, the magnetic field offers high energy for atom movement and matching, as well as reduces the difference of Gibbs free energy between two phases, such as FCC and HCP phase 27–29. Above all, the effective property modification of HEAs can be achieved via tailoring their phase structures.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the magnetic field offers high energy for atom movement and matching, as well as reduces the difference of Gibbs free energy between two phases, such as FCC and HCP phase. [27][28][29] Above all, the effective property modification of HEAs can be achieved via tailoring their phase structures. Moreover, the realization of the property modification of HEAs can not only improve the performance but also provide a great opportunity to achieve the desired phase with predictable features.Here, in this review, we mainly summarize the phase engineering of HEAs (Scheme 1).…”

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confidence: 99%

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Phase Engineering of High‐Entropy Alloys

et al. 2020

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High‐entropy alloys (HEAs) are based on five or more principal elements with equal or nearly equal molar fractions and possess many significant advantages over traditional alloys, including high strength and hardness, excellent corrosion resistance, outstanding thermal stability, and irradiation resistance. Phase structure plays a vital role in determining the property of HEAs. For further enhancing the performance of HEAs in various application fields, a controllable synthesis with desired phases is required. In this review, the diverse phase structures of HEAs and the related properties are first introduced. Then, alternative tuning strategies to promote the desired phase structure of HEAs are focused upon. Property adjusting of phase‐engineered HEAs is also discussed in depth. Lastly, some insights into the challenges and future prospects in this rapidly emerging research field are provided.

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Section: Magnetic Controllingmentioning

confidence: 96%

Section: Phase Engineering Of Heasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Phase Engineering of High‐Entropy Alloys

et al. 2020

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“…HEAs containing Co, Fe and Ni elements usually possess electromagnetic wave absorbing and magnetic properties. [243][244][245][246] The composition coupled with the microstructures of the 3Dprinted HEA products can substantially influence their magnetization behaviors and magnetic properties. Borkar et al evaluated the magnetic properties of DED-printed AlCoxCr1-xFeNi HEA products with varying Co content (Figure 28).…”

Section: Kuwubawa Et Al Discovered That the Corrosion Resistance Of Ebm-printed Alcocrfenimentioning

confidence: 99%

Recent Advances on High‐Entropy Alloys for 3D Printing

et al. 2020

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Boosted by the success of high-entropy alloys (HEAs) manufactured by conventional processes in various applications, the development of HEAs for three-dimensional (3D) printing has been advancing rapidly in recent years. 3D printing of HEAs gives rise to great potential for manufacturing geometrically complex HEA products with desirable performances, thereby inspiring their increased manifestation in industrial applications. In this paper, a comprehensive review of the recent achievements of 3D printing of HEAs is provided, in the aspects of their powder development, printing processes, microstructures, properties and potential applications. It begins with the introduction of the fundamentals of 3D printing and HEAs as well as the unique properties of 3D-printed HEA products. The processes for the development of HEA powders, including atomization and mechanical alloying, and the powder properties are then presented. Thereafter, typical processes for printing HEA products from powders, namely, directed energy deposition, selective laser 2 melting and electron beam melting, are discussed with regard to the phases, crystal features, mechanical properties, functionalities and potential applications of these products (particularly in the aerospace, energy, molding and tooling industries). Finally, perspectives are outlined to provide guidance for future research.

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Synergistic Enhancement of Electromagnetic Wave Absorption and Corrosion Resistance Properties of High Entropy Alloy Through Lattice Distortion Engineering

Qiu,

Liu,

Yang

et al. 2024

Adv Funct Materials

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High entropy alloys (HEAs) are promising electromagnetic wave absorption (EMA) materials due to its designable crystal structure, variable electromagnetic properties, and excellent corrosion resistance. However, the impedance mismatch owing to the high electric and dielectric conductivity severely hinders the application of HEAs in the field of EMA. Herein, the lattice distortion of FeCoNiCu HEA is manipulated accurately by doping and annealing strategies to tailor the EMA properties. Significant lattice distortion is observed in the FeCoNiCuC0.37, which leads to a decrease in the electrical conductivity and the creation of abundant dipoles. Owing to the optimal impedance matching and boosted polarization loss, the FeCoNiCuC0.37 delivers a minimal reflection loss of −65.4 dB accompanied by an effective absorption bandwidth (EAB) of 6.81 GHz. After annealing at 200 °C, the EAB of the FeCoNiCuC0.37 is further increased to 7.99 GHz at 1.95 mm, which is better than that of most HEA‐based EMA absorbers reported so far. Moreover, it demonstrates excellent corrosion resistance owing to the more tortuous diffusion path of corrosive medium origin from lattice distortion. Thus, the study provides a new insight into designing high performance HEA‐based EMA materials with superior anti‐corrosion property by lattice distortion engineering.

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Electromagnetic wave absorption properties for FeCoNiCr alloy powders with magnetic field heat treatment

Cited by 16 publications

References 19 publications

Phase Engineering of High‐Entropy Alloys

Phase Engineering of High‐Entropy Alloys

Recent Advances on High‐Entropy Alloys for 3D Printing

Synergistic Enhancement of Electromagnetic Wave Absorption and Corrosion Resistance Properties of High Entropy Alloy Through Lattice Distortion Engineering

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