Article
Chemistry, Physical
Nankun Chen, Chao Wang, Yiyao Xiao, Rui Han, Qiong Wu, Ningning Song
Summary: This study demonstrates an effective method for enhancing the microwave absorption property of Nd2Co17 flakes without using any dielectric materials, by tuning the anisotropy of the flakes through changing the milling time.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Condensed Matter
Qian-qian Hao, Zhi Wang, Xian-hua Li, Yan Zhang, Rui-min Shi
Summary: The addition of appropriate amount of Ti in the alloy can improve its soft magnetic properties, leading to superior magnetic softness at different temperature ranges.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Yan Zhang, Zhi Wang, Xian-hua Li, Qian-qian Hao, Rui-min Shi
Summary: Investigation of the structure and soft magnetic properties of nanocrystalline (Fe0.9Co0.1)(72.7)Al0.8Si13.5Cu1Nb3B8V1 alloy annealed at 510-690 degrees C revealed that with increasing annealing temperature, grain size and volume fraction of the crystalline phase increased while the thickness of the amorphous layer decreased. Higher annealing temperatures resulted in improved high-temperature initial permeability up to 630 degrees C, but a dramatic deterioration was observed at 690 degrees C due to the precipitation of hard magnetic phase.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Physical
Anatoly B. Rinkevich, Dmitry V. Perov, Yuriy I. Ryabkov
Summary: The microwave properties of a composite material containing finemet-type nanocrystalline alloy flakes in an epoxy matrix were investigated, with two different compositions (15% and 30% flakes) studied. Frequency dependences of transmission and reflection coefficients were measured in the frequency range from 12 to 38 GHz, with dielectric permittivity and magnetic permeability obtained and microwave losses calculated. The study also analyzed the influence of wave interference on the frequency dependence of microwave absorption, and defined regions of maximal and minimal microwave absorption.
Article
Chemistry, Multidisciplinary
Dmitry Perov, Anatoly B. Rinkevich
Summary: The propagation of microwaves in a composite material with Fe-Si-Nb-Cu-B alloy flakes embedded in an epoxyamine matrix was studied. The theory developed allowed for the calculation of dynamic magnetic permeability tensor coefficients and effective magnetic permeability. The magnetic field dependencies of transmission and reflection coefficients were measured at frequencies ranging from 12 to 38 GHz, showing variations under resonance and antiresonance conditions. The dissipation of microwave power was also calculated and measured, demonstrating changes in electromagnetic field penetration depth.
Article
Materials Science, Multidisciplinary
Kang Qiu, Ali Hassan, Junsong Wang, Chenghong Zhang, Youlin Gao, Mahmoud A. Khalifa, Wei Ding, Xiangkai Kong, Qiangchun Liu, Zhigao Sheng
Summary: In this study, the magnetic alignment effect on the microwave absorption property of bio-carbon flakes was demonstrated. The prepared flakes tended to align in a desired direction when subjected to a magnetic field. A rotating magnetic field showed a better alignment effect and significantly improved microwave absorption efficiency. Under optimized conditions, the flakes achieved a maximum reflection loss of -49.7 dB at 6.6 GHz and a maximum effective bandwidth of 4.9 GHz (10.66-15.56 GHz). The study found that the maximum reflection loss of the sample treated in a rotating magnetic field was 4.6 and 5.85 times higher than that of samples treated in static and non-magnetic field conditions, respectively. This work provides a simple and environmentally friendly method to enhance the macroscopic order degree and microwave absorption performance of carbon materials.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Xiaogang Sun, Jian Xu, Lian Huang, Daitao Kuang, Jinrong Liu, Guanxi Wang, Qifei Zhang, Yonghua Duan
Summary: This study demonstrates the excellent tunable microwave absorption properties of Ni43Co7Mn39Sn11 alloy flakes achieved through phase control. The optimal reflection loss reaches -56.4 dB at 8.8 GHz, with a single thickness of 2.0 mm. This research provides valuable references for the study of microwave absorption materials in metal alloys.
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, Multidisciplinary
Fengyu Li, Hong Xia, Qing-Qing Ni
Summary: In this study, a facile and low-cost method using egg white as a carbon and sulfur source was developed for the first time to fabricate microwave absorption materials. The introduction of a trimetallic alloy derived from cobalt, iron, and nickel nitrates was found to enhance the microwave attenuation capability of the egg-white-derived carbon flakes. The analysis of dielectric and magnetic constants showed that the alloy affected dielectric loss, while increasing the amount of alloy affected magnetic loss more significantly.
Article
Materials Science, Multidisciplinary
Junjie Wang, Shangshu Wu, Shu Fu, Sinan Liu, Zhiqiang Ren, Mengyang Yan, Shuangqin Chen, Si Lan, Horst Hahn, Tao Feng
Summary: A nanocrystalline CoCrFeNiMn high-entropy alloy with nano-multiphase structure was prepared by laser evaporation source using inert gas condensation, exhibiting unexpected ferromagnetic behavior and significantly increased Curie temperature. The saturation magnetization and Curie temperature of the alloy can be controlled through heat treatment, attributed to the formation and structural evolution of magnetic nanophases during annealing, expanding the design toolbox for high-performance nc-HEAs based on laser-IGC technique.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Monika Michalska, Dominika A. Buchberger, Jacek B. Jasinski, Arjun K. Thapa, Amrita Jain
Summary: The electrochemical performance of lithium manganese oxide composites with graphene oxide in Li-ion batteries was studied, showing that the composite with 5%wt. graphene oxide exhibited better capacity retention after cycling.
Article
Engineering, Electrical & Electronic
Daniel E. Gaona, Chaoqiang Jiang, Teng Long
Summary: Nanocrystalline alloys are being considered as an alternative to ferrite magnetic cores in inductive power transfer systems due to their superior properties. This article presents special considerations and methods for designing nanocrystalline ribbon cores, showing that they outperform ferrite cores in terms of magnetic performance, efficiency, and power density.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Chemistry, Physical
Ruiheng Zhang, Aina He, Lei Xie, Jianhua Zhang, Yaqiang Dong, Jiawei Li, Bojun Zhang, Yanxin Liu
Summary: In this study, transverse magnetic field annealing was applied to a high saturation induction alloy, leading to improved high-frequency properties and refined magnetic domains. Additionally, the role of dual anisotropies on magnetic performance was investigated, providing guidance for optimizing the performance of common mode chokes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Talluri Manoj, Hari Prasanth Perumal, Bibekananda Paikaray, Arabinda Haldar, Jaivardhan Sinha, Pinaki Prasad Bhattacharjee, Chandrasekhar Murapaka
Summary: High entropy alloys have gained significant attention recently due to their unique microstructures and properties. Among them, the eutectic HEA AlCoCrFeNi2.1 is particularly attractive for its unprecedented mechanical properties. However, the functional properties of this alloy have not been well explored. In this study, researchers investigated the magnetic properties of nanocrystalline EHEA films grown by RF magnetron sputtering before and after annealing at different temperatures. The results showed the presence of perpendicular magnetic anisotropy (PMA) in the films annealed at 600 degrees C, while the as-deposited and annealed samples at lower temperatures only exhibited in-plane anisotropy behavior. The presence of PMA was attributed to the formation of Al2O3 on the film surface.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Aina He, Jiawei Li, Mingkun Wang, Anding Wang, Yao Xiao, Yaqiang Dong, Hai Guo, Rongrong Jiang, Weixing Xia, Lihong Dong, Haidou Wang, Jianya Ge
Summary: The phase, crystal orientation, nanostructure, and magnetic domain evolution of surface-crystallized Fe-rich alloy were systematically investigated. The results show that magnetic field annealing has a significant effect on the alloy surface, reducing excess loss and dynamic loss.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Correction
Materials Science, Multidisciplinary
Hui Zheng, Mangui. Han, Longjiang Deng, Liang Zheng, Jiangxia Deng, Peng Zheng, Huibin Qin, Qiong Wu
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2019)
Article
Engineering, Electrical & Electronic
Hui Zheng, Mangui Han, Yanhui Wu, Liang Zheng, Wenjing Zhao, Longjiang Deng, Huibin Qin
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2018)
Article
Materials Science, Multidisciplinary
Mangui Han, Wu Zhou
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Xing Luo, Yanhui Wu, Mangui Han, Longjiang Deng
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2018)
Article
Multidisciplinary Sciences
Yang Guo, Li Zhang, Mangui Han, Xin Wang, Jianliang Xie, Longjiang Deng
ROYAL SOCIETY OPEN SCIENCE
(2018)
Article
Nanoscience & Nanotechnology
Deqi Deng, Mangui Han
Article
Materials Science, Multidisciplinary
Hui Zheng, Jun Luo, Qiong Wu, Peng Zheng, Liang Zheng, Mangui Han, Yang Zhang
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2019)
Article
Engineering, Multidisciplinary
Dengxun Ren, Kui Li, Lin Chen, Sijing Chen, Mangui Han, Mingzhen Xu, Xiaobo Liu
COMPOSITES PART B-ENGINEERING
(2019)
Article
Materials Science, Multidisciplinary
Anastasia Kosevich, Elizaveta Petrusevich, Sergey Maklakov, Andrey Naboko, Evgeniy Kolesnikov, Dmitry Petrov, Polina Zezyulina, Konstantin Pokholok, Dmitry Filimonov, Mangui Han
Article
Materials Science, Multidisciplinary
Mangui Han
Summary: Periodically ordered Fe nanowires embedded in anodic alumina nanoporous templates were successfully prepared by electrochemical deposition. Experimental and micromagnetics simulations revealed strong magnetic dipolar interactions among the nanowires, as well as multiple natural resonances in the nanowires array, believed to be caused by the inhomogeneous localized magnetic anisotropic field. Mossbauer spectra further verified the inhomogeneous alignment of magnetic moments.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Physical
Guo Lin, Zhongxiang Bai, Mangui Han, Kun Jia, Yumin Huang, Xiaobo Liu
SOLID STATE IONICS
(2020)
Article
Chemistry, Applied
Guo Lin, Tong Cao, Zhongxiang Bai, Shuning Liu, Chenchen Liu, Mangui Han, Yumin Huang, Xiaobo Liu
Summary: Flame-retardant PEN porous membranes were prepared by nonsolvent induced phase separation method in this study. These membranes exhibit high thermal stability and flame retardant properties, ensuring the high temperature security of lithium batteries. The PEN-IPA membrane with three-dimensional interconnected dendritic network structure shows the best electrolyte affinity and the highest ionic conductivity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Physics, Multidisciplinary
Banghan Wang, Mangui Han, Mingzhen Xu
Summary: The high frequency permittivity of Fe-based nanocrystalline flakes changes with milling time, with peak frequency showing an inverse relationship with static dielectric constant. Total dielectric loss also increases with milling time. The study uses the Havriliak-Negami model to analyze the dispersion behaviors of permittivity, showing that both symmetric and asymmetric broadening factors contribute to the deviation of measured permittivity spectra from theoretical dispersion. The dispersion of permittivity is attributed to the Maxwell-Wagner-Sillars interfacial polarization resulting from differences in conductivity between two phases in the nanostructures of the flakes.
CHINESE JOURNAL OF PHYSICS
(2021)
Article
Polymer Science
Dengxun Ren, Mingzhen Xu, Sijing Chen, Xiaoqian Xu, Shuai Zhang, Mangui Han, Xiaobo Liu
Summary: Introduction of fluorinated substituents in molecular chains is an efficient method to prepare materials with decreased dielectric constant and loss, as demonstrated in the synthesis of a kind of fluorinated phthalonitrile containing benzoxazine. The cured BPAF-ph showed double-stage curing reaction behaviors and good processability, with structures and properties being influenced by different post curing procedures. The glass fiber reinforced BPAF-ph composites exhibited promising properties in terms of thermal and mechanical stability.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Mangui Han
Summary: The results of this study show that the terahertz (THz) permeability of an isolated L1(0)-FePt alloy nanowire with super hard ferromagnetic properties is significant at 0.348 THz, as long as it is at proper remanent states. This challenges the common belief that ferromagnetic materials cannot be used in the terahertz domain due to their weak dynamic magnetic responses.
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
