Article
Materials Science, Multidisciplinary
Fabio Martins Cardoso, Cristina Bormio-Nunes
Summary: The study successfully prepared a FeCoNi(GaNb)(0.20) multicomponent alloy with low magnetostriction and high permeability values, suitable for use in electric machines and magnetic devices in the subkilohertz frequency range.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Engineering, Manufacturing
Shihao Li, Kwang Boon Lau, Delvin Wuu, Fengxia Wei, Ming Lin, Augustine Cheong, Pei Wang, Cheng Cheh Tan, Upadrasta Ramamurty
Summary: The study demonstrates the successful fabrication of bulk equiatomic Fe-Co alloy with a disordered BCC phase using the LPBF technique, which imparts considerable ductility to the alloy. Subsequent annealing heat treatment will maximize the soft magnetic properties of the material.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Ceramics
D. A. Milkova, A. I. Bazlov, E. N. Zanaeva, A. Yu. Churyumov, I. V. Strochko, E. V. Ubyivovk, A. Inoue
Summary: The magnetic properties of amorphous Fe38Ni38B12P5Si3Nb3Cu1 alloy ribbons have been studied. The addition of Cu and Nb to the alloy system changed the crystallization process, resulting in excellent soft magnetic properties, low coercive force and high effective permeability. The further increase in annealing temperature caused the precipitation of nanoscale fcc particles, forming a nanostructure alloy with good soft magnetic properties. The synthesis of these new Fe-Ni-based glassy and nanocrystalline [fcc(Fe,Ni) + glass] alloy ribbons with ultrasoft magnetic properties is promising as a new type of energy-saving soft magnetic material.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
R. M. Rowan-Robinson, Z. Leong, N. A. Morley
Summary: This article presents a method of using AlMn to create a CoFeMn0.5Alx alloy, which has reduced Co content but comparable soft magnetic properties as CoFe alloys, providing a more economical alternative to pure CoFe soft magnets.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Minhao Han, Cheng Sun, Hongjie Xu, Yang Meng, Qiang Luo, Boying Qiao, Yani Xu, Tao Zhang
Summary: This study investigates the effect of rapid annealing (RA) on the crystallization behavior and soft magnetic properties of Fe-Co-B amorphous alloys. It is found that RA generates large superheating which increases the homogenous nucleation rate of nanocrystals, while the short duration inhibits the growth kinetics, resulting in fine and dense nanograins. The Fe-Co-B alloy exhibits optimized properties of low coercivity and high saturation magnetization after RA treatment. In contrast, conventional annealing produces large and sparse grains with high coercivity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Tyler W. Paplham, David W. Greve, Mohendro K. Ghosh, Lauren Wewer, Paul R. Ohodnicki
Summary: The adoption of electric vehicles has shown a significant upward trend in the last decade. A novel technique called transverse induction annealing has been demonstrated as a pathway to continuous spatial variation in microstructure of bulk crystalline soft magnetic alloys, enabling the optimization of magnetic and mechanical properties. This technique offers potential for improved performance and co-optimization of magnetic laminations with motor designs.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Physical
Sefa Emre Sunbul, Selmine Akyol, Suat Onal, Sultan Ozturk, Huseyin Sozeri, Kursat Icin
Summary: FeB-based alloys were produced using the vacuum arc melting method, with various compositions achieved by gradually adding different elements with Cu, Co, and Mo. The study investigated the structural, magnetic, and electrochemical properties of these alloys. The addition of Mo led to a significant change in the structure, with Fe3B phase formation instead of Fe2B depending on solidification rate. The phase structure, microstructure, and morphology of the other alloys remained unchanged. Hardness increased from 41.88 HRC to 64.24 HRC due to the phase change. All FeB-based alloys exhibited soft magnetic properties, with the Fe85B15 alloy showing the lowest coercivity of 13 Oe and the Fe63Co21Cu1B15 alloy showing the highest saturation magnetization of 173 emu/g. The Fe85B15 alloy had the lowest corrosion resistance at 6.47 x 10-5 A.cm-2, while the Fe38Co38Mo8Cu1B15 alloy had the highest corrosion resistance at 8.21 x 10-6 A.cm-2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Z. Li, R. Parsons, H. Kishimoto, T. Shoji, A. Kato, J. Karel, K. Suzuki
Summary: This study investigated the glass-forming range, microstructural features, and soft magnetic properties of (Fe(1-x-)yCo(x)Ni(y))(86)B-14 alloys. It was found that Fe-rich compositions have the largest glass-forming range and exhibit nano-scale grains with bcc and fcc structures after ultra-rapid annealing. The coercivity and saturation magnetic polarization of the nanocrystalline alloys are affected by Co and Ni content, with Co addition generally increasing coercivity and saturation magnetic polarization, while Ni addition has the opposite effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jiawei Wang, Yuyi Wei, Yifan He, Cunzheng Dong, Xianqing Lin, Huaihao Chen, Xianfeng Liang, Chengju Yu, Mingmin Zhu, Yi Zhang, Jun Ni, Nian X. Sun
Summary: Co-Fe-C alloy films have attracted attention for their excellent magnetic properties, with thermal annealing improving their performance. Medium carbon doping in the alloy films provides high thermal stability, attributed to stable structure phases and element distributions during thermal annealing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
H. Can, K. Icin, S. Akyol, U. Topal, S. Ozturk, H. Sozeri
Summary: (FeCo)84CuB15 soft magnetic alloys with Fe/Co ratios (5:1, 3:1, and 1:1) were prepared by planar flow casting method. The structural and magnetic properties were characterized using XRD and SEM. The magnetic parameters were determined by vibrating sample magnetometer and B-H loop tracer. The magnetic field variations on the surface of the ribbons were investigated using a magnetic force microscope. Fluxgate sensors were prepared and their magnetic field sensing ability, working range, and noise were measured. The alloys showed soft magnetic behavior with high magnetization values and low coercivities. Permeability values increased with increasing Fe/Co ratio. However, the magnetic field sensing feature and noise parameters decreased as the Fe/Co ratio increased, while the working range of the sensors enlarged.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Martin Stueckler, Stefan Wurster, Markus Alfreider, Michael Zawodzki, Heinz Krenn, Andrea Bachmaier
Summary: This study investigates the structural evolution and magnetic properties of Co-Zr composite through high-pressure torsion processing and subsequent thermal treatment. The results demonstrate that severe plastic deformation can result in an amorphous microstructure with low coercivity and different annealed states can further modify the magnetic properties.
Article
Chemistry, Physical
Yuluo Li, Ningning Shen, Li Chen, Kuang Lv, Xidong Hui
Summary: The study found that reducing the Cu content is beneficial for enhancing the formation of amorphous structure and improving the glass forming ability (GFA) in high P Fe-based nanocrystalline alloys. Additionally, when the Cu content is between 1.0 at.% and 0.6 at.%, reducing Cu does not significantly affect the thermal physical properties of the alloys, leading to lower coercivity and higher saturation magnetic flux density.
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)
Article
Chemistry, Physical
Saijian Ajia, Hirotaka Asa, Yuichiro Toyoda, Mitsuharu Sato, Masashi Matsuura, Nobuki Tezuka, Satoshi Sugimoto
Summary: The alternative application of Fe-Cr-Co magnetic alloys as microwave absorption materials was investigated. Composite samples of Fe-25Cr-12Co powder with resin were prepared and their microwave absorption properties in the gigahertz (GHz) band were evaluated. It was found that the complex permeability of the composites could be adjusted by the final aging temperature, showing potential advantages for microwave absorption applications in the GHz frequency range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Yanzhou Fan, Suo Zhang, Xiaofei Xu, Jiakai Miao, Weiwei Zhang, Tan Wang, Chen Chen, Ran Wei, Fushan Li
Summary: Soft magnetic alloy Fe83.3SixB16-xCu0.7 (x = 0, 1, 2, 3 and 4) ribbons were produced by single roller melt spinning method. The addition of appropriate amount of Si improves thermal stability, soft magnetic properties and corrosion resistance. Alloy with x = 1 shows excellent soft magnetic properties and improved corrosion resistance, making it a promising candidate for future applications.
