Review
Materials Science, Ceramics
Shuhan Lu, Minggang Wang, Zhankui Zhao
Summary: Soft magnetic composites (SMCs) are crucial in electromagnetic conversion, with significant role in power production, transmission, and utilization. Third-generation semiconductors require soft magnetic materials with distinct characteristics such as high response, power density, and low total loss. Fe-based amorphous soft magnetic alloys exhibit exceptional properties, including high saturation magnetization, low coercivity, and high permeability. To reduce eddy current loss, ultrathin laminating or powder composite cores are recommended. Amorphous soft magnetic composites (ASMCs) are produced through powder metallurgy techniques using insulated and/or coated amorphous soft magnetic powders. This paper presents the development history, insulation and coating preparation methods, molding preparation technology, heat treatment process, and recent achievements of Fe-based ASMCs. It also highlights future research hotspots, trends, critical concerns, development prospects, and directions.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Yichuan Tang, Yuan Wan, Zhongqi Wang, Cong Zhang, Jiani Han, Chaohao Hu, Chengying Tang
Summary: This study presents a machine learning and Python assisted approach for accelerating the design and verification of Fe-based alloys with desired properties. Various machine learning algorithms were employed to predict the soft magnetic properties, and Python screening was used to identify the alloy compositions with the best performance. The experimental results confirmed the reliability and effectiveness of the machine learning and Python assisted method in accelerating alloy design.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Z. G. Zheng, Y. B. Chen, J. Wei, X. Wang, Z. G. Qiu, D. C. Zeng
Summary: The effects of Fe content and annealing temperature on the microstructure, thermal stability, and soft magnetic properties of Fe-rich alloys were investigated. Increasing Fe content up to 85% allowed the formation of a single amorphous phase, but beyond that, crystalline phase appeared. Higher Fe content resulted in a larger crystallization temperature interval, contributing to the process of heat treatment and preparation of amorphous/nanocrystalline soft magnetic materials. The optimum annealing treatment at 430℃ for 10 minutes yielded a high saturation magnetization of 208 emu/g.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Hu Li, Anding Wang, Tao Liu, Pingbo Chen, Aina He, Qiang Li, Junhua Luan, Chain-Tsuan Liu
Summary: A revolutionary nanostructure design concept was proposed in this study to improve the magnetic properties of Fe-based alloys by preforming dense nuclei and refining nano-structure via transient metalloid-rich interfaces. A novel alloy composition with superior magnetic properties was developed using only 4.6 wt.% light metalloids, showing great potential as a substitute for commercial bulk Si-steels in soft-magnetic applications.
Article
Materials Science, Ceramics
Shuai Cao, Guangyin Liu, Jiankang Huang, Xiaoquan Yu, Ding Fan, Yu Ni, Yiming Luo
Summary: Iron-based amorphous alloys have attracted significant attention due to their soft magnetic property. This study explores the influence of annealing temperature and alloy composition on the formation of nanocrystals in these alloys using molecular dynamics simulations. Various characterization techniques are applied to analyze the resulting amorphous structures. The results indicate that the Fe78Si15B7 amorphous alloy exhibits a higher tendency to adopt the standard icosahedral structure and the percentage of icosahedral formation during annealing has a nonlinear relationship with temperature. Furthermore, the proportions of both icosahedral and standard icosahedral structures increase with extended annealing time.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Review
Chemistry, Physical
Ahmed Talaat, David W. Greve, M. V. Suraj, Paul R. Ohodnicki
Summary: This review discusses the rapid thermal processing of amorphous and nanocrystalline soft magnetic alloys in electromagnetic fields, focusing on the effects of heating on structural and magnetic properties. It also presents future development trends and challenges in the field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
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)
Review
Materials Science, Multidisciplinary
Xiaojing Qi, Junhua You, Jifeng Zhou, Keqiang Qiu, Xiaoli Cui, Jia Tian, Boliang Li
Summary: This article provides a brief introduction to soft magnetic materials, including their classification, preparation methods, properties, and applications. It also reviews the effects of various elements on the properties of Fe-based amorphous and nanocrystalline alloys. The challenges and development directions in the research of these alloys are identified.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
F. Ozdemir, C. S. Witharamage, J. Christudasjustus, A. A. Darwish, H. Okuyucu, R. K. Gupta
Summary: Nanocrystalline Al-Fe alloy, produced by high-energy ball milling, exhibits uniform microstructure and high solid solubility of Fe. It shows high hardness and corrosion resistance, attributed to the nanocrystalline structure and formation of solid solution. The incorporation of Fe to the surface film and Fe enrichment at the alloy/surface film interface enhance the corrosion performance.
Article
Chemistry, Physical
Beata Butvinova, Pavol Butvin, Igor Matko, Peter Svec, Magdalena Kadlecikova
Summary: The properties of Fe-Co-Sn / P-B ribbons prepared by planar flow casting of the melt in both as-cast and nanocrystallized state were investigated. The influence of surfaces on the magnetic properties of the ribbons was examined, revealing a significant impact on magnetic properties, especially after annealing at high temperatures.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Zhiguang Shi, Xuan Li, Ruijun Cao, Xingcheng Xie, Kaishen Li, Zhongkun Lin, Jian Yang, Tao Zhang
Summary: By adjusting the concentration of metalloid elements, it was found that the addition of B is beneficial for glass formation with high Fe content, C addition can improve saturated magnetization, and P addition is beneficial for reducing coercivity. Additionally, optimal amorphous alloys maintain good bending ductility even after annealing treatment close to crystallization temperature.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Anil Kumar, Sapan Kumar Nayak, Atanu Banerjee, Tapas Laha
Summary: This study investigated the room temperature creep behavior of Fe-based amorphous/nanocrystalline coatings synthesized via plasma spraying at different power levels. The micro- and nano-indentation tests showed that the creep resistance of the coatings was influenced by porosity, crystallinity, and the presence of mixed phases. The coatings deposited at higher power exhibited higher creep resistance, while the mixed phase demonstrated better creep resistance compared to fully amorphous phase.
Article
Materials Science, Multidisciplinary
F. Zamborszky, B. Gyuere-Garami, B. Janosi, L. Vajtai, L. Hegyessy, I Gresits, F. Simon
Summary: This study investigates the high frequency magnetic properties of Fe-based nanocrystalline alloys and observes a single-exponential magnetic relaxation phenomenon using the coaxial probe-head method. Compared to the conventional wired approach, the coaxial probe-head method provides more reliable data on dynamic susceptibility.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Review
Engineering, Chemical
Zexuan Huo, Guoqing Zhang, Junhong Han, Jianpeng Wang, Shuai Ma, Haitao Wang
Summary: Amorphous alloys, as emerging metal materials, possess excellent properties of high strength and high hardness. However, their machining performance is affected by crystallization and high temperature, and Fe-based amorphous alloys suffer from extremely high hardness and chemical tool wear. Tool-assisted machining, low-temperature lubrication assisted machining, and magnetic field-assisted machining can effectively improve the machining performance of Fe-based amorphous alloys.
Article
Chemistry, Physical
Ziqi Song, Zhaoxuan Wang, Qi Chen, Zhigang Qi, Ki Buem Kim, Weimin Wang
Summary: The effect of Cr element on the corrosion behavior of Fe-based alloys was investigated. The results showed that the addition of Cr could improve the glass formability and corrosion resistance of the alloys, while the excessive CrFeB phase could deteriorate the properties of passive film.
Review
Materials Science, Multidisciplinary
Zhe Li, Junhua You, Yaozu Guo, Chengze Li, Yufeng Zhang, Ziyu Liu
ADVANCED ENGINEERING MATERIALS
(2020)
Review
Green & Sustainable Science & Technology
Junhua You, Yao Zhao, Lu Wang, Wanting Bao
Summary: Covalent Organic Frameworks (COFs) are crystalline covalent polymers with high surface area and stable porosity, showing great potential for functionalization. Researchers are highly interested in novel and advanced COF materials for their wide range of useful applications. The use of COFs in photocatalytic applications is rapidly developing, offering an exciting avenue for scientific contributions in the field.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Inorganic & Nuclear
Lu Wang, Junhua You, Yao Zhao, Wanting Bao
Summary: The core-shell structured CuO@NiCoMn-LDH electrode was synthesized and the synergistic effect between CuO nanowires and NiCoMn-LDH nanosheets was found to greatly enhance the electrode materials. The optimized CuO@NiCoMn-LDH electrode exhibited excellent electrochemical performance, with high specific capacity and good cycling stability. Furthermore, an asymmetric supercapacitor (ASC) was constructed using the CuO@NiCoMn-LDH electrode as the positive electrode, demonstrating its potential for practical applications in energy storage devices.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Multidisciplinary
Guihong Song, Ying Liu, Liyang Ran, Yi Shao, Fang Hu, Yusheng Wu, Hao Du, Junhua You
Summary: Mg2Sn films with layered structure were prepared using alternative magnetron sputtering. The phase composition and thermoelectric properties of the films were studied. It was found that the content of metal Mg phase in the films can affect the resistivity and Seebeck coefficient, and films with a small amount of metal Mg phase showed higher Seebeck coefficient and power factor.
Review
Chemistry, Physical
Zhiwei Wang, Junhua You, Jingjing Li, Jingsheng Xu, Xuanhao Li, Hangzhou Zhang
Summary: In the era of rapid global industrialization, water pollution has become a serious concern. Photo-Fenton catalysis has gained research interest as a simple and efficient method. However, the limited action of pure CoFe2O4 nanocatalysts due to agglomeration and recombination of particles inhibits their high catalytic activity. This paper summarizes the main problems of current photo-Fenton catalysis technology and introduces the properties, degradation mechanism, and preparation methods of CoFe2O4. It also discusses effective strategies for enhancing catalytic performance.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jin Gao, Yifan Wang, Jianxin Hou, Junhua You, Keqiang Qiu, Suode Zhang, Jianqiang Wang
Summary: In this study, five machine learning models were used to predict the phase of high entropy alloys based on a database of 511 labeled data. Features were selected using XGBoost and the ensemble learning methods of Voting and Stacking showed the highest predictive accuracy of over 92%. A decision tree was used to visualize the alloy designing process and provide valuable information for feature selection and suitable machine learning models in high entropy alloy design.
Article
Chemistry, Multidisciplinary
Rui Guo, Shengqi Zhang, Hui Wen, Zhiyuan Ni, Yan He, Tao Yu, Junhua You
Summary: This work presents a NiCo-150 composite catalyst prepared via a simple two-step electrodeposition method, exhibiting outstanding OER performance. The in situ growth technique effectively reduces internal resistance and increases electrochemically active sites. XAS measurements indicate that Co ions may play a crucial role as the most important active center in the catalytic mechanism.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Rui Guo, Yan He, Renchao Wang, Junhua You, Hongji Lin, Chiente Chen, Tingshan Chan, Xuanwen Liu, Zhiwei Hu
INORGANIC CHEMISTRY FRONTIERS
(2020)
Review
Chemistry, Multidisciplinary
Shengqi Zhang, Tao Yu, Hui Wen, Zhiyuan Ni, Yan He, Rui Guo, Junhua You, Xuanwen Liu
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Yaozu Guo, Dong Zhao, Junhua You, Wenli Pei, Yingdong Qu, Xiaoyang Wang, Qingyu Meng
