Article
Materials Science, Ceramics
Jili Ding, Hongjie Xu, Zhiguang Shi, Xuan Li, Tao Zhang
Summary: The influence of primary alpha-Fe precipitation on thermal and magnetic properties was investigated by producing Fe76.5-xCu1NbxSi13.5B9 (x=0, 1, 2 and 3) amorphous/nanocrystalline ribbons through melt-spinning. It was found that rapid quenching and heat treatment had similar effects on alpha-Fe precipitation. By optimizing components and heat treatment, magnetic properties of the ribbons could be significantly improved.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Nanoscience & Nanotechnology
Haitang Yang, Yun Tan, Yanwei Zhang, Yihang Xiong, Gaosheng Nie, Heng Luo, Pei He, Junliang Yang, Xiangguo Zhao, Jinchao Tong, Yi Zhang
Summary: Maintaining dynamic microwave synchronization between a target and its background is crucial for achieving electromagnetic invisibility in real environments. This study introduces a paradigmatic example of ultra-elastic films made of graphene-functionalized ionic gel, which exhibit tunable microwave-absorbing behaviors. By changing the shape of a 3D wrinkled structure with ridge walls of moderate impedance, the reflected wave can be minimized and energy attenuation can be promoted. Experimental and finite element simulations demonstrate an optimal RL value of -43.6 dB and a valid regulatory amplitude of 41.5 dB, covering a range from microwave-absorbing to shielding state.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Elham Sharifikolouei, Antoni Zywczak, Baran Sarac, Tomasz Koziel, Reza Rashidi, Piotr Bala, Michela Fracasso, Roberto Gerbaldo, Gianluca Ghigo, Laura Gozzelino, Daniele Torsello
Summary: In this study, Fi(40)Ni(40)B(20) metallic glass microfibers with a diameter of 5 μm were fabricated, and the influence of different melt-spinning wheel velocities on their structure and magnetic properties was investigated. Cylindrical magnetic field shields with anisotropic static field shielding behavior were obtained by wrapping the microfibers around a cast. Moreover, embedding the microfibers in an epoxy matrix significantly improved the electromagnetic properties of the composite at GHz frequencies.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Chemical
Sheng Yang, Jia Xu, Mengyuan Tian, Jian Wang, Tiansheng Yang, Guanbiao Li, Yihai He, Meiqin Zeng, Xin Liu
Summary: The influence of zinc stearate on the microstructure and soft magnetic properties of Finemet nanocrystalline soft magnetic composites (NSMCs) was investigated. It was found that increasing the zinc stearate content led to a decrease in core loss and an increase in effective permeability, which can be attributed to the reduction of residual stress. However, excessive addition of zinc stearate resulted in a sharp increase in core loss and a decrease in effective permeability due to decomposition during annealing. After annealing, a thin hybrid layer containing iron phosphate, ZnO, and SiO2 was formed in the NSMCs with 2.0 wt% zinc stearate, exhibiting excellent soft magnetic properties.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Chang Liu, Mingrui Han, Jingpeng Lin, Wei Liu, Jiurong Liu, Zhihui Zeng
Summary: With the rapid development of wireless communications, the issue of electromagnetic wave pollution and interference has become severe, creating a need for high-performance electromagnetic wave absorbers and shields. Carbon-based materials, specifically wood biomass-derived carbon materials, have gained recognition due to their satisfactory conductivity, low density, and corrosion resistance. These materials have a unique porous structure and can effectively absorb and shield electromagnetic waves, providing a valuable use for wood biomass resources. This review highlights the role of wood biomass-derived carbon materials in various electromagnetic wave absorbing and shielding materials, explores related studies, and discusses the obstacles and prospects of wood biomass-derived carbon materials.
Article
Engineering, Electrical & Electronic
Mingzhe Sang, Xianglin Li, Peng Han, Zhiheng Zhang, Wei Hua
Summary: A new compound magnetic shielding (CMS) is proposed to reduce the impact of rich harmonics and non-negligible amplitude magnetic field on the critical current Ic of HTS-excitation coil in the analyzed DS-HTSM. The CMS consists of a copper shield layer and a combined flux diverters (FDs) including the silicon steel sheet (SSS) FD and the Fe-based nanocrystalline alloy (FNA) FD. The results show that the critical current Ic of HTS-excitation coil in the analyzed DS-HTSM can be improved by 36% after using the proposed CMS.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Chemistry, Physical
Abd El-Moez A. Mohamed, R. S. Sheridan, Kai Bongs, Moataz M. Attallah
Summary: This study introduces a deep analysis to correlate metallurgical characters with magnetic properties in laser powder bed fusion processed Ni-Fe-Mo for producing 3D prototypes with maximum magnetic shielding performance. The optimization of magnetic properties through laser parametric study achieved the best results, but further research is needed for improving magnetic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yang Meng, Shujie Pang, Chuntao Chang, Junhua Luan, Akihisa Inoue, Tao Zhang
Summary: The effects of Si on the microstructure, soft magnetic properties, and bendability of rapidly-annealed Fe83SixB14-xP2Cu1 nanocrystalline ribbons were investigated. The substitution of B with Si promoted the formation of alpha-Fe(Si) grains and suppressed the precipitation of the hard-magnetic phase, resulting in a wider annealing temperature range for preparing alloys with high saturation magnetization and low coercivity. The alloys with higher Si contents exhibited improved bendability due to a more uniform distribution of Si compared to B.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Licheng Wu, Yanhui Li, Aina He, Zhengwang Zhu, Haifeng Zhang, Wei Zhang
Summary: This study investigates the effects of Cu addition on the structure and magnetic properties of Fe-based alloys. It is found that Cu can improve the alloy's structure and magnetic properties, thus enhancing its commercial application value.
Article
Chemistry, Physical
Branislav Kunca, Jozef Marcin, Richard Parsons, Peter Svec, Peter Svec sr, Kiyonori Suzuki, Ivan Skorvanek
Summary: Ultra-rapid annealing (URA) with pre-heated massive Cu blocks has been found to be effective in producing Fe-(Co)-B based nanocrystalline alloys with reduced metalloid content and desirable magnetic properties. However, further research is needed to understand the behavior of these alloys at elevated temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Cheng Sun, Hongjie Xu, Yang Meng, Chekai Liu, Boying Qiao, Lingjie Lu, Tao Zhang
Summary: In this study, Fe-P based nanocrystalline alloys were successfully prepared through Nb microalloying, exhibiting excellent soft magnetic properties and processibility. Among them, the Fe85.4P11C2B1Cu0.5Nb0.1 alloy showed optimal soft magnetic properties, with high saturation magnetization and low coercivity.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Nanoscience & Nanotechnology
Ping-an Yang, Zhengwei Qu, Haibo Ruan, Yuxuan Huang, Xin Huang, Wanjun Li, Tian Xia, Bing Gao, Rui Li
Summary: This study utilized iron nanowires with excellent microwave absorbing properties to construct structures with ordered nanowire distributions, resulting in flexible transparent electromagnetic interference (EMI) shielding films with high transmittance and shielding efficiency. The ordered nanowire network structure effectively addresses the trade-off issue between light transmittance and EMI shielding efficiency, providing a new approach for creating high-performance EMI shielding films.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Daria Yudina, Mie Marsilius, Jozef Bednarcik
Summary: This study focuses on the quantitative description of structural anisotropy in the Fe73.6Cu1Nb3Si15.5B6.9 alloy induced during tensile annealing. X-ray diffraction was used to investigate the structural changes caused by annealing under uniaxial tensile deformation. The results show that Fe3Si nanocrystalline grains growing in the tensile direction have a higher lattice spacing, while the opposite is observed in the transverse direction. The difference in lattice strain between the longitudinal and transverse directions is proportional to the applied tensile stress and serves as a quantitative parameter for stress-induced anisotropy (SIA).
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Composites
Hongtao Guo, Minhui Zheng, Xiaofan Ma, Runchi Cao, Kunming Liu, Weisen Yang, Shaoju Jian, Shaohua Jiang, Gaigai Duan
Summary: In this study, carbon composite fabrics of TaC/Fe3C-Fe were fabricated using electrospinning technology and high temperature pyrolysis. The materials showed low density, excellent electrical conductivity, and good saturation magnetization. The optimum mass ratio of Ta and Fe was determined to achieve the maximum EMI shielding performance. The material has potential commercial applications.
COMPOSITES COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
C. Liu, A. Inoue, F. L. Kong, E. Zanaeva, A. Bazlov, A. Churyumov, S. L. Zhu, F. Al-Marzouki, R. D. Shull
Summary: Soft magnetic Fe-B-Si-C-Cu amorphous alloys demonstrate high saturation magnetization, low coercivity, high permeability, and hardness. By designing the microstructure carefully, even higher hardness and stability can be achieved.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
