Article
Chemistry, Multidisciplinary
Xuesong Li, Jing Zhou, Laiquan Shen, Baoan Sun, Haiyang Bai, Weihua Wang
Summary: This study achieves excellent comprehensive soft magnetic properties with high saturation magnetic flux density and low coercivity through the construction of a transitional microstructure in an FeCo-based alloy.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xingjie Jia, Bojun Zhang, Wei Zhang, Yaqiang Dong, Jiawei Li, Aina He, Run-Wei Li
Summary: The structure, magnetic properties, and ductility of melt-spun Fe-Si-B-Cu alloys were investigated. The addition of Cu and C resulted in increased saturation magnetic flux density while slightly decreasing magnetic softness. The annealing process further improved the magnetic properties and maintained the ductility of the alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Mingjuan Cai, Jingjing Wang, Qianqian Wang, Zhijun Guo, Qiang Luo, Jing Zhou, Tao Liang, Xuesong Li, Qiaoshi Zeng, Baolong Shen
Summary: Stress annealing is used to enhance the magnetic softness of Fe83-xCoxB10Si3C3P1 (x = 0-16) amorphous alloys with a saturation polarization of up to 1.75 T. The stress-annealed alloys exhibit improved soft-magnetic properties, including low coercivity (1.8-2.2 A/m), low core loss (0.09-0.11 W/kg at 1.0 T and 50 Hz), and high permeability (27,000-33,200 at 5 A/m and 1 kHz). The enhanced magnetic softness is attributed to the induced longitudinal magnetic anisotropy and the annihilation of free volume caused by stress annealing.
MATERIALS RESEARCH LETTERS
(2023)
Article
Chemistry, Physical
Haohui Huang, Rui Zhang, Haibo Sun, Jichao Zhang, Jinghui Wang
Summary: The influences of compacting temperature (Tc), molding pressure (Pm), contents of lubricant (Cl) and binder (Cb) on the compacted density (Pc) and its comprehensive soft magnetic properties for the FeSiCr soft magnetic composites (SMCs) fabricated by warm compaction were systematically studied. Appropriate increase of Tc is beneficial to improve the surface lubrication effect of magnetic powders during the forming process of SMCs, thus giving rise to the increase of Pc and the decrease of porosity fraction for the SMCs. Under this situation, the resistance of domain rotation and domain wall displacement in the SMCs during magnetization process is reduced, which is finally in favor of the improvement of SMCs's soft magnetic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Min Zhao, Jing Pang, Yiran Zhang, Wei Zhang, Qingchun Xiang, Yinglei Ren, Xiaoyu Li, Keqiang Qiu
Summary: A (Fe0.83B0.11Si0.02P0.03C0.01)(99.5)Cu-0.5 glass former was developed based on Fe83B11Si2P3C1 alloy. A new rapid annealing method was used to investigate the effect of temperature and time on the improvement of soft magnetic properties. The results show that the addition of Cu expands the interval between the first and second crystallization temperature. The alloy ribbon annealed by the new method exhibits higher saturation magnetization and lower coercivity compared to other nanocrystalline alloys with similar Fe content.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Mahdi Harivandi, Mehdi Malekan, S. A. Seyyed Ebrahimi
Summary: In this study, equiatomic FeCoNiCuMn high entropy alloy was prepared and its microstructure and properties were improved by annealing. The alloy exhibited good soft magnetic properties and high electrical resistivity, along with proper strength and ductility.
METALS AND MATERIALS INTERNATIONAL
(2022)
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, Analytical
Chang-Hung Hsu
Summary: This study compared the electromagnetic power and noise characteristics of micro-alternators with different housing structures. The shell coated with an iron-based amorphous-alloy soft magnetic material showed lower demagnetization rate and reduced noise characteristics. However, the overall performance of generator harmonics and power were not fully improved.
Article
Chemistry, Physical
Chuntao Chang, Zheng Xiang, Chengliang Zhao, Anding Wang, Ruirui Song, Deng Pan
Summary: The addition of Ta and Nb elements can effectively improve the soft-magnetic properties of Fe-Si-B-P-Cu alloys, making the heat treatment range of the alloy wider. Nb and Ta doping is most beneficial for stabilizing and refining the nanocrystalline structure of the alloy, which has a significant impact on the heat treatment conditions of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Z. Li, K. F. Yao, T. C. Liu, X. Li, S. Wang
Summary: Through the study, it has been found that the Fe66.8Co10Ni10Cu0.8Nb2.9Si11.5B8 nanocrystalline alloy possesses excellent soft magnetic properties and temperature stability, indicating great potential for application in the field of current transformers.
FRONTIERS IN MATERIALS
(2022)
Article
Automation & Control Systems
Hao Hua, Wei Hua
Summary: In this paper, an analytical method based on the air-gap MMF permeance model is proposed to predict the nonlinear instantaneous torque of SRMs. The method utilizes analytical expressions for the air-gap MMF and permeance, as well as a saturation distribution factor. The proposed method does not require preliminary data or empirical coefficients and benefits from a simplified model and solution. Experimental validation of the method is also conducted.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Wei Gao, Yaqiang Dong, Xingjie Jia, Liping Yang, Xubin Li, Shouding Wu, Ronglin Zhao, Hang Wu, Qiang Li, Aina He, Jiawei Li
Summary: Co4Fe2Al1.5Mn1.5 high-entropy alloy with exceptional soft magnetic properties was investigated. It exhibited the highest saturation magnetization strength (161.3 emu g -1) reported for magnetic HEAs, low coercivity (1.9 Oe), high electrical resistivity (173 mu S2 cm), and superior thermal stability up to 600 degrees C. Microstructure of B2 nanoparticles in a DO3 matrix phase and the transition of Mn from antiferromagnetism to ferromagnetism with the assistance of Al contributed to these properties. This study paves the way for the development of soft magnetic HEAs with promising applications.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Peixin Fu, Junlei Shi, Ruichen Shi, Yuyang Zhang, Jingtao Qi, Yuanzheng Yang
Summary: In this study, the effect of low transverse magnetic field annealing on the soft magnetic properties of Finemet ribbons cores was investigated. The static/dynamic magnetic properties and average grain size of cores obtained by zero-field annealing, secondary-field annealing, and direct-field annealing were studied. It was found that secondary-field annealing resulted in an increase in average grain size and effective permeability, leading to improved high-frequency characteristics.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Cristina Bormio-Nunes, Fabio Martins Cardoso, Rodolfo da Silva Teixeira, Jhonatan Feitoza Bastos
Summary: This study investigated the magnetic properties and electrical resistivity of FeCoNi(CuAl)x alloys in different forms. It was found that high annealing temperature and thermomechanical processing affected the microstructure and magnetic properties of the alloys. The alloy with CuAl=1.6 showed an unexpected improvement in saturation magnetization, which was attributed to the formation of Cu-rich nanoprecipitates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yu Sun, Jiawei Li, Aina He, Lei Xie, Yaqiang Dong, Yanxin Liu, Ruiheng Zhang, Kewei Zhang
Summary: The effect of anisotropy and microstructure on the high-frequency magnetic properties of nanocrystalline Fe77.8Si11.6B7Nb2Cu0.6P1 toroidal cores has been studied. The optimal soft magnetic characteristics were obtained when the < K-1 >/Ku ratio was approximately 1.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Physical
Guoyang Zhang, Hongwei Ni, Yang Li, Tao Liu, Anding Wang, Hua Zhang
Summary: A revolutionary method for preparing Fe-based amorphous alloys from high-phosphorus oolitic iron ore was proposed, combining smelting reduction and melt-spinning. The developed process showed the feasibility of energy-saving and resource-friendly production of soft-magnetic materials.
Article
Nanoscience & Nanotechnology
Yuanming Tan, Zengren Tao, Yuanfei Zhu, Zhao Chen, Anding Wang, Shimei Lai, Yangyi Yang
Summary: This study investigates the charge-transfer interaction between I-3(-) and pyrimidine nitrogen based on molecular orbital theory, with experimental and computational results supporting the proposed mechanism. It provides a new direction for research on high-performance cathode materials for iodine batteries.
ACS APPLIED MATERIALS & INTERFACES
(2022)
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)
Article
Chemistry, Multidisciplinary
Yuanming Tan, Zhao Chen, Zengren Tao, Anding Wang, Shimei Lai, Yangyi Yang
Summary: Iodine has great potential in energy storage, but its high solubility of I-3(-) has hindered its promotion. Two-dimensional coordination supramolecular networks (2D CSNs) with abundant active sites and open channels are considered a candidate for energy storage. In this study, a 2D porphyrin-CSN cathode named Zn-TCPP exhibited excellent specific capacity (278 mAh g(-1)), high energy density (340 Wh kg(-1)) at 5 A g(-1)), durable cycle performance (5000 cycles), and high Coulombic efficiency (98%) in an aqueous iodine dual-ion battery (DIB). Molecular orbital theory, UV/VIS, Raman spectroscopy, and density functional theory (DFT) calculations showed charge-transfer interaction between the donor of porphyrin nitrogen and the acceptor of I-3(-), while computational fluid dynamics (CFD) simulations demonstrated the contribution of the 2D layered network structure of Zn-TCPP to the penetration of I-3(-).
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Electrical & Electronic
Anding Wang, Guiyi Wei
Summary: This article proposes a novel adaptive algorithm with an optimal diagonal step size matrix for multi-dimensional channel principal component tracking. The algorithm not only accelerates the convergence speed distinctively but also improves the tracking of multi-dimensional eigenvectors.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Runjian Zhou, Jiangang Wen, Yuanping Zou, Anding Wang, Jingyu Hua, Bin Sheng
Summary: A lightweight image compression method combining JPEG and number theoretic transformation (NTT) is proposed in this paper, which outperforms other common compression algorithms in terms of compression ratio and reduces the requirement for transmission rate in IoT devices.
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Dongpeng Wang, Guang Chen, Anding Wang, Yuxin Wang, Yanxin Qiao, Zhenguang Liu, Zhixiang Qi, Chain Tsuan Liu
Summary: To investigate the correlation between single-crystalline structure and corrosion performance in high-strength TiAl alloys, the electrochemical and surface characterization of Ti-45Al-8Nb dual-phase single crystals and polycrystalline counterparts were compared in NaCl solution. The results showed that the dual-phase single crystals exhibited a lower corrosion rate, higher pitting potential, and a more compact passive film with a higher impedance of charge transfer compared to the polycrystals. This enhanced corrosion resistance can be attributed to the more homogeneous microstructure and composition distribution in the dual-phase single crystals.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Chemistry, Physical
Anding Wang, Zengren Tao, Yuanfei Zhu, Yuanming Tan, Zhao Chen, Shimei Lai, Yangyi Yang
Summary: The application of mild aqueous zinc metal batteries (AZMBs) is hindered by issues such as dendrite formation and hydrogen evolution. In this study, a new type of zinc anode coated with zinc dithiosalicylate coordination supramolecular networks (CSNs) was developed, which effectively inhibits the diffusion of zinc ions and improves the electrochemical kinetics.
JOURNAL OF POWER SOURCES
(2023)
Article
Nanoscience & Nanotechnology
Zhaowen Huang, Donghui Wen, Xionghua Jiang, Anding Wang, Yusheng Li, Yang Cao, Xiaodong Hou, Biao Wang, Yuntian Zhu
Summary: The slip system variations induced by excess yield stress in Ti at the early stage of plastic deformation were studied in-depth. It was found that normal grain refinement and suppressed dislocation source activation in refined-grain can significantly increase the yield stress. Combined calculations of Schmid factor and critical resolved shear stress showed that small-grain samples with higher yield stress can activate both < a >-prismatic slip and < c+a >-pyramidal slip, while large-grain samples can only activate < a >-prismatic slip. This slip system transition can explain the abnormal fine-grain strengthening effect and stress drop after yielding in Ti.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Chengliang Zhao, Pere Bruna, Anding Wang, Hao Wang, Aina He, Chenyang Xie, Chunxiao Xie, Zhen-zhong Sun, Chuntao Chang, Daniel Crespo, Akihisha Inoue
Summary: This study clarifies the effect of small magnetic fields on the magnetic properties and microstructure in FeCoSiBPC amorphous alloys. The results show that small fields can decrease the coercivity Hc and affect the crystallization growth and proportion of bcc-Fe(Co) phase.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Energy & Fuels
Zhao Chen, Zengren Tao, Yuanming Tan, Yuanfei Zhu, Anding Wang, Shimei Lai, Yangyi Yang
Summary: The search for high-energy and fast Li-ion transportation in lithium-ion battery (LIB) anode materials has attracted the attention of scientists. Coordination supramolecular networks (CSNs) have adjustable structures and various intermolecular forces, making them suitable for energy storage devices. In this study, 1D-CoCSN and 3D-CoCSN were synthesized using a coordination reaction. XPS, FTIR, and DFT analyses revealed that the active groups in 1D-CoCSN are involved in the storage process of lithium ions and can transfer electrons through the chain structure. 1D-CoCSN demonstrated a high capacity and stable cycling performance.
Article
Chemistry, Physical
Chenyu Lu, Jiacheng Ge, Si Lan, Xuelian Wu, Zhenduo Wu, Lingxiang Shi, Anding Wang, Yan Zhang, Chi Long Lai, Kit Ying Leung, Junhua Luan, Elliot Paul Gilbert, Xun-Li Wang
Summary: The alpha-Fe precipitates in a high-performance Fe83.3Si4B8P4Cu0.7 nanocrystalline alloy were found to have a core-shell nanostructure through small-angle neutron scattering and atom probe tomography. The core-shell structure, with P-enriched shells around Fe-enriched cores, was visualized directly through atom probe tomography, attributed to the large negative heat of mixing between Fe and P elements and the slow diffusion of P atoms. These core-shell nanostructures induced by nanoscale partitioning effectively stabilize the residual amorphous matrix and suppress crystal growth. The findings provide insights into the microstructure of Fe-based amorphous alloys and have direct implications in alloy design for improving soft magnetic properties.
Article
Physics, Applied
H. Wang, Q. F. He, A. D. Wang, Y. Yang
Summary: We fabricated severely distorted high-entropy Elinvar alloys through micro-alloying of (CoNi)(50-x)(TiZrHf)(50)Fe-x (in atomic percentage). Our experiments demonstrate a tunable Elinvar effect that is positively correlated with overall lattice distortion in single-phase B2 high entropy alloys. Additionally, we propose a simple physical model that captures the general trend of our experimental findings.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Zengren Tao, Jiawei Cui, Yuanming Tan, Zekun Zhou, Zhao Chen, Anding Wang, Yuanfei Zhu, Shimei Lai, Minghao Yu, Yangyi Yang
Summary: A multifunctional separator for Zn-V2O5 batteries is developed by growing a coordination supramolecular network (CSN:Zn-MBA) on non-woven fabrics. This separator allows for Zn2+ transfer while inhibiting VO2(OH)(2)(-) penetration, leading to dendrite-free Zn deposition. The Zn-V2O5 cells with this separator exhibit high capacity and excellent cyclability.
Article
Engineering, Aerospace
Weijun Pan, Zirui Yin, Yuming Luo, Anding Wang, Yuanjing Huang
Summary: This paper proposes a method to reduce aircraft separation using dynamic wake information based on changes in flight velocity. By analyzing the evolution of wake vortex and establishing an aerodynamic model, the dynamic wake-based separation technology is proven to greatly reduce aircraft separation requirements while ensuring operation safety.
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)
