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Journal articles on the topic 'Shell magnets'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Prokofev, Pavel A., Natalia B. Kolchugina, Katerina Skotnicova, et al. "Blending Powder Process for Recycling Sintered Nd-Fe-B Magnets." Materials 13, no. 14 (2020): 3049. http://dx.doi.org/10.3390/ma13143049.

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The wide application of Nd-Fe-B permanent magnets, in addition to rare-earth metal resource constraints, creates the necessity of the development of efficient technologies for recycling sintered Nd-Fe-B permanent magnets. In the present study, a magnet-to-magnet recycling process is considered. As starting materials, magnets of different grades were used, which were processed by hydrogen decrepitation and blending the powder with NdHx. Composition inhomogeneity in the Nd2Fe14B-based magnetic phase grains in the recycled magnets and the existence of a core-shell structure consisting of a Nd-ric

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2

Lee, M. W., K. H. Bae, S. R. Lee, H. J. Kim, and T. S. Jang. "Microstructure and Magnetic Properties of NdFeB Sintered Magnets Diffusion-Treated with Cu/Al Mixed Dyco Alloy-Powder." Archives of Metallurgy and Materials 62, no. 2 (2017): 1263–66. http://dx.doi.org/10.1515/amm-2017-0189.

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AbstractWe investigated the microstructural and magnetic property changes of DyCo, Cu + DyCo, and Al + DyCo diffusion-treated NdFeB sintered magnets. The coercivity of all diffusion treated magnet was increased at 880ºC of 1stpost annealing(PA), by 6.1 kOe in Cu and 7.0 kOe in Al mixed DyCo coated magnets, whereas this increment was found to be relatively low (3.9 kOe) in the magnet coated with DyCo only. The diffusivity and diffusion depth of Dy were increased in those magnets which were treated with Cu or Al mixed DyCo, mainly due to comparatively easy diffusion path provided by Cu and Al be

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3

Veciana, Jaume, and Hiizu Iwamura. "Organic Magnets." MRS Bulletin 25, no. 11 (2000): 41–51. http://dx.doi.org/10.1557/mrs2000.223.

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The notion of organic molecular materials showing metallic properties, such as electric conductivity or ferromagnetism, started several decades ago as a mere dream of some members of the chemical community. The goal was to create an assembly of organic molecules or macromolecules containing only light elements (C, H, N, O, S, etc.) and yet possessing the electron/hole mobility or spin alignment that is inherent in typical metals or their oxides and different from the isolated molecular materials. Organic molecular conductors initially were developed during the 1960s, but the first examples of

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4

Hilse, Maria, Jens Herfort, Bernd Jenichen, et al. "GaAs–Fe3Si Core–Shell Nanowires: Nanobar Magnets." Nano Letters 13, no. 12 (2013): 6203–9. http://dx.doi.org/10.1021/nl4035994.

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5

Lu, Yaojun, Shuwei Zhong, Munan Yang, et al. "Nd-Fe-B Magnets: The Gradient Change of Microstructures and the Diffusion Principle after Grain Boundary Diffusion Process." Materials 12, no. 23 (2019): 3881. http://dx.doi.org/10.3390/ma12233881.

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The diffusion of Tb in sintered Nd-Fe-B magnets by the grain boundary diffusion process can significantly enhance coercivity. However, due to the influence of microstructures at different depths, the coercivity increment and temperature stability gradually decreases with the increase of diffusion depth, and exhibit good corrosion resistance at a sub-surface layer (300–1000 μm). According to the Electron Probe Micro-analyzer (EPMA) test results and the diffusion mechanism, the grain boundary and intragranular diffusion behavior under different Tb concentration gradients were analyzed, and the d

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6

Bance, S., J. Fischbacher, and T. Schrefl. "Thermally activated coercivity in core-shell permanent magnets." Journal of Applied Physics 117, no. 17 (2015): 17A733. http://dx.doi.org/10.1063/1.4916542.

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7

Tomków, Łukasz, Stanisław Trojanowski, Marian Ciszek, and Maciej Chorowski. "Heat generation by eddy currents in a shell of superconducting bus-bars for SIS100 particle accelerator at FAIR." Archives of Electrical Engineering 66, no. 4 (2017): 705–15. http://dx.doi.org/10.1515/aee-2017-0053.

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Abstract Superconducting magnets in the SIS100 particle accelerator require the supply of liquid helium and electric current. Both are transported with by-pass lines designed at Wrocław University of Technology. Bus-bars used to transfer an electric current between the sections of the accelerator will be encased in a steel shell. Eddy currents are expected to appear in the shell during fast-ramp operation of magnets. Heat generation, which should be limited in any cryogenic system, will appear in the shell. In this work the amount of heat generated is assessed depending on the geometry of an a

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8

Li, Pu, Jung Goo Lee, Xing Long Dong, and Chul Jin Choi. "Preparation and Characteristics of MnAlC Nanoparticles by Plasma Arc-Discharge." Materials Science Forum 675-677 (February 2011): 307–10. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.307.

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MnAlC nanoparticles were synthesized by plasma arc-discharge method. Heat treatment of these nanoparticles at temperature from 400 to 600 °C resulted in the formation of the ferromagnetic τ-phase. Most of the nanoparticles had nearly spherical shape, smooth surface and core/shell structure. The shells of the nanoparticles mainly consisted of Al2O3 and a small amount of Mn oxides. Though the saturation magnetization of MnAlC nanoparticles was lower than that of bulk samples due to the effect of nonmagnetic phases (β, γ2 and Mn3AlC) and the oxide shell, the highest coercivity, up to 5.6 kOe in t

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9

Qu, Pengpeng, Feifei Li, Sajjad Ur Rehman, et al. "Optimized Microstructure and Improved Magnetic Properties of Pr-Dy-Al-Ga Diffused Sintered Nd-Fe-B Magnets." Materials 14, no. 10 (2021): 2583. http://dx.doi.org/10.3390/ma14102583.

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The grain boundary diffusion process (GBDP) has become an important technique in improving the coercivity and thermal stability of Dy-free sintered Nd-Fe-B magnets. The influence of Dy70Al10Ga20 and (Pr75Dy25)70Al10Ga20 alloys by the GBDP on sintered Nd-Fe-B magnets are investigated in this paper. After diffusing Dy70Al10Ga20 and (Pr75Dy25)70Al10Ga20 alloys, the coercivity (Hcj) of the magnets increased from 13.58 kOe to 20.10 kOe and 18.11 kOe, respectively. Meanwhile, the remanence of the magnets decreased slightly. The thermal stability of the diffused magnets was improved by the GBDP. The

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10

Ikram, Awais, M. Farhan Mehmood, Zoran Samardžija, et al. "Coercivity Increase of the Recycled HDDR Nd-Fe-B Powders Doped with DyF3 and Processed via Spark Plasma Sintering & the Effect of Thermal Treatments." Materials 12, no. 9 (2019): 1498. http://dx.doi.org/10.3390/ma12091498.

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The magnetic properties of the recycled hydrogenation disproportionation desorption recombination (HDDR) Nd-Fe-B powder, doped with a low weight fraction of DyF3 nanoparticles, were investigated. Spark plasma sintering (SPS) was used to consolidate the recycled Nd-Fe-B powder blends containing 1, 2, and 5 wt.% of DyF3 grounded powder. Different post-SPS sintering thermal treatment conditions (600, 750, and 900 °C), for a varying amount of time, were studied in view of optimizing the magnetic properties and developing characteristic core-shell microstructure in the HDDR powder. As received, rec

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11

de Campos, Marcos Flavio, and Sergio Antonio Romero. "Suitable Nanostructures for Obtaining the Maximum Energy Product in Magnets." Materials Science Forum 869 (August 2016): 614–19. http://dx.doi.org/10.4028/www.scientific.net/msf.869.614.

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The existence of exchange coupling or magnetostatic coupling between two phases, one magnetically hard and other magnetically soft is a way for obtaining higher maximum energy product (BHmax). In this study, it is discussed the microstructures for obtaining either exchange coupling or magnetostatic coupling in real materials. One relevant condition is that the assumptions of the Stoner-Wohlfarth model should be obeyed, with both phases, hard and soft, with dimensions less than single domain particle size. A real possibility is enveloping a spherical grain of hard phase with a first shell of so

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12

Dubrovin, Vasilii, Alexey A. Popov, and Stanislav Avdoshenko. "Magnetism in Ln molecular systems with 4f/valence-shell interplay (FV-magnetism)." Chemical Communications 55, no. 93 (2019): 13963–66. http://dx.doi.org/10.1039/c9cc06913e.

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The hunt for high-performance single-molecule magnets (SMM) revealed that lanthanide systems combining 4f- and valence-shells show magnetic bistability up to very high temperatures. We rationalize magnetism in such systems from first principles.

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13

Truong, Nguyen Xuan, Nguyen Trung Hieu, Vu Hong Ky та Nguyen Van Vuong. "2D Simulation of Nd2Fe14B/α-Fe Nanocomposite Magnets with Random Grain Distributions Generated by a Monte Carlo Procedure". Journal of Nanomaterials 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/759750.

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The magnetic properties of Nd2Fe14B/α-Fe nanocomposite magnets consisting of two nanostructured hard and soft magnetic grains assemblies were simulated for 2D case with random grain distributions generated by a Monte Carlo procedure. The effect of the soft phase volume fraction on the remanenceBr, coercivityHc, squarenessγ, and maximum energy product(BH)maxhas been simulated for the case of Nd2Fe14B/α-Fe nanocomposite magnets. The simulation results showed that, for the best case, the(BH)maxcan be gained up only a several tens of percentage of the origin hard magnetic phase, but not about hund

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14

Zhang, Jun Hui, Zhi Li Zhang, De Cai Li, and Jie Yao. "Effects of Magnetic Fluid on Magnetic Fluid Damper." Key Engineering Materials 512-515 (June 2012): 1479–83. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.1479.

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A magnetic fluid damper which based on the principle of second-order buoyancy of magnetic liquid has been presented. During the process of damping, besides the elastic deformation of magnetic liquid adsorbed by permanent magnet, the main ways of energy dissipation are the friction functions, which include the friction between magnets and magnetic liquid, magnetic fluid and magnetic fluid and magnetic fluid and the shell of the damper. In order to investigate influence of magnetic fluid on damping effect, a series of experiments under different magnetic fluid with related parameters including m

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15

de Campos, Marcos Flavio, and José Adilson de Castro. "Modeling the Heat Treatment of Dy-Diffused Nd₂Fe₁₄B Magnets: The Shell Model." Materials Science Forum 727-728 (August 2012): 146–50. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.146.

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In Nd2Fe14B sintered magnets there is increase of coercivity after Dy diffusion in the region near the surface of the grains. A kinetical model evaluating the Dy surface diffusion is presented. This model is based on a shell hypothesis: the most relevant place for the nucleation is a tiny shell near the grain boundaries. The kinetical analysis shows that a heat treatment during 1 hour at 850°C is able to produce a Dy-rich layer on the surface of the Nd2Fe14B grains.

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16

Lima-Santos, A., and W. Utiel. "Off-shell Bethe ansatz equation for osp(2∣1) Gaudin magnets." Nuclear Physics B 600, no. 3 (2001): 512–30. http://dx.doi.org/10.1016/s0550-3213(00)00752-5.

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17

Ferracin, P. "ChemInform Abstract: Shell-Based Support Structures for Nb3Sn Accelerator Quadrupole Magnets." ChemInform 41, no. 52 (2010): no. http://dx.doi.org/10.1002/chin.201052220.

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18

Safari, J., S. Gandomi-Ravandi, and Z. Haghighi. "Supported polymer magnets with high catalytic performance in the green reduction of nitroaromatic compounds." RSC Advances 6, no. 37 (2016): 31514–25. http://dx.doi.org/10.1039/c5ra26613k.

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19

Wang, Xiao Dong, Yves Fautrelle, M. D. Dupouy, Ting Jie Li, and J. Z. Jin. "Free Surface Flow Control and Electromagnetically-Driven Stirring by a Double-Permanent-Magnet-Driver." Materials Science Forum 508 (March 2006): 629–34. http://dx.doi.org/10.4028/www.scientific.net/msf.508.629.

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This paper presents a method aimed at controlling free surface flow and stirring melt via a magnetic field induced by the permanent magnets. The rotating magnetic field (RMF) can realize the free surface shape control and the melt stirring simultaneously. Numerical model was built to analyse the magnetic field distribution. Two drivers that have the same structure were analysed and optimised. Quasi-steady-state free surface was obtained by regulating the rotating velocity of the magnetic drivers, which is proportional to the magnetic force. Solidification experiment was preformed on a platform

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20

Hou, Y., Z. Xu, S. Peng, C. Rong, J. P. Liu, and S. Sun. "A Facile Synthesis of SmCo5 Magnets from Core/Shell Co/Sm2O3 Nanoparticles." Advanced Materials 19, no. 20 (2007): 3349–52. http://dx.doi.org/10.1002/adma.200700891.

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21

BABUJIAN, H. M., and R. FLUME. "OFF-SHELL BETHE ANSATZ EQUATION FOR GAUDIN MAGNETS AND SOLUTIONS OF KNIZHNIK-ZAMOLODCHIKOV EQUATIONS." Modern Physics Letters A 09, no. 22 (1994): 2029–39. http://dx.doi.org/10.1142/s0217732394001891.

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We generalize the previously established connection between the off-shell Bethe ansatz equation for inhomogeneous SU(2) lattice vertex models in the quasiclassical limit and the solutions of the SU(2) Knizhnik-Zamolodchikov equations to the case of simple Lie algebras of higher rank.

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22

Lee, M. W., D. R. Dhakal, T. H. Kim, S. R. Lee, H. J. Kim, and T. S. Jang. "Effect Of DyMn Alloy-Powder Addition On Microstructure And Magnetic Properties Of NdFeB Sintered Magnets." Archives of Metallurgy and Materials 60, no. 2 (2015): 1407–9. http://dx.doi.org/10.1515/amm-2015-0142.

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Abstract Micostructural change and corresponding effect on coercivity of a NdFeB sintered magnet mixed with small amount of DyMn powder was investigated. In the sintered magnet mixed with the DyMn alloy-powder Dy-rich shell was formed at outer layer of the main grains, while Mn was mostly concentrated at Nd-rich triple junction phase (TJP), lowering melting temperature of the Nd-rich phase that eventually improved the microstructural characteristics of the gain boundary phase. The coercivity of a magnet increased more than 3.5 kOe by the mixing of the DyMn alloy-powder.

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23

Ito, M., M. Yano, N. Sakuma, et al. "Coercivity enhancement in Ce-Fe-B based magnets by core-shell grain structuring." AIP Advances 6, no. 5 (2016): 056029. http://dx.doi.org/10.1063/1.4945040.

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24

Seelam, U. M. R., T. Ohkubo, T. Abe, S. Hirosawa, and K. Hono. "Faceted shell structure in grain boundary diffusion-processed sintered Nd–Fe–B magnets." Journal of Alloys and Compounds 617 (December 2014): 884–92. http://dx.doi.org/10.1016/j.jallcom.2014.07.166.

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25

Jin, Jiaying, Zheng Wang, Guohua Bai, Baixing Peng, Yongsheng Liu, and Mi Yan. "Microstructure and magnetic properties of core-shell Nd-La-Fe-B sintered magnets." Journal of Alloys and Compounds 749 (June 2018): 580–85. http://dx.doi.org/10.1016/j.jallcom.2018.03.291.

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26

Shimamoto, Kojiro, Hiroaki Morita, Yasuo Kannoto, Yoichi Iwamoto, and Setsuo Takezawa. "Development of Stiffened Shell Type Coil Collar of Dipole Magnets for Superconducting Electromagnetic Thruster." JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN 27, no. 5 (1992): 368–74. http://dx.doi.org/10.5988/jime1966.27.368.

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27

Fonin, M., S. Voss, S. Herr, et al. "Influence of the ligand shell on the surface orientation of Mn12 single molecule magnets." Polyhedron 28, no. 9-10 (2009): 1977–81. http://dx.doi.org/10.1016/j.poly.2008.11.028.

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28

Liu, Fei, Yunhe Dong, Wenlong Yang, Jing Yu, Zhichuan Xu та Yanglong Hou. "Exchange-Coupled fct-FePd/α-Fe Nanocomposite Magnets Converted from Pd/Fe3O4Core/Shell Nanoparticles". Chemistry - A European Journal 20, № 46 (2014): 15197–202. http://dx.doi.org/10.1002/chem.201403787.

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29

Liu, Fei, Jinghan Zhu, Wenlong Yang, et al. "Building Nanocomposite Magnets by Coating a Hard Magnetic Core with a Soft Magnetic Shell." Angewandte Chemie International Edition 53, no. 8 (2014): 2176–80. http://dx.doi.org/10.1002/anie.201309723.

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30

Liu, Fei, Jinghan Zhu, Wenlong Yang, et al. "Building Nanocomposite Magnets by Coating a Hard Magnetic Core with a Soft Magnetic Shell." Angewandte Chemie 126, no. 8 (2014): 2208–12. http://dx.doi.org/10.1002/ange.201309723.

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31

Li, Hailing, Xiaohong Li, Defeng Guo, Li Lou, Wei Li, and Xiangyi Zhang. "Three-Dimensional Self-Assembly of Core/Shell-Like Nanostructures for High-Performance Nanocomposite Permanent Magnets." Nano Letters 16, no. 9 (2016): 5631–38. http://dx.doi.org/10.1021/acs.nanolett.6b02210.

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32

Feng, Hai Bo, Xin Shuo Chen, and An Hua Li. "Dual-shell core structure in grain boundary diffused high Ce content magnets with CeFe2 phase." Journal of Magnetism and Magnetic Materials 522 (March 2021): 167493. http://dx.doi.org/10.1016/j.jmmm.2020.167493.

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33

Oikawa, T., H. Yokota, T. Ohkubo, and K. Hono. "Large-scale micromagnetic simulation of Nd-Fe-B sintered magnets with Dy-rich shell structures." AIP Advances 6, no. 5 (2016): 056006. http://dx.doi.org/10.1063/1.4943058.

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34

Skotnicova, Katerina, Pavel A. Prokofev, Natalia B. Kolchugina, et al. "Application of a Dy3Co0.6Cu0.4Hx Addition for Controlling the Microstructure and Magnetic Properties of Sintered Nd-Fe-B Magnets." Materials 12, no. 24 (2019): 4235. http://dx.doi.org/10.3390/ma12244235.

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The focus of new technologies on the formation of inhomogeneous distributions of heavy rare-earth metals (REMs) in hard magnetic Nd–Fe–B materials is of scientific importance to increase their functional properties, along with preserving existing sources of heavy REMs. This paper focused on the coercivity enhancement of Nd2Fe14B-based magnets by optimizing the microstructure, which includes the processes of grain boundary structuring via the application of a Dy3Co0.6Cu0.4Hx alloy added to the initial Nd–Fe–B-based powder mixtures in the course of their mechanical activation. We have studied th

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35

Kim, Tae-Hoon, T. T. Sasaki, T. Koyama, et al. "Formation mechanism of Tb-rich shell in grain boundary diffusion processed Nd–Fe–B sintered magnets." Scripta Materialia 178 (March 2020): 433–37. http://dx.doi.org/10.1016/j.scriptamat.2019.12.002.

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36

Helbig, Tim, Konrad Loewe, Simon Sawatzki, Min Yi, Bai-Xiang Xu, and Oliver Gutfleisch. "Experimental and computational analysis of magnetization reversal in (Nd,Dy)-Fe-B core shell sintered magnets." Acta Materialia 127 (April 2017): 498–504. http://dx.doi.org/10.1016/j.actamat.2017.01.055.

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37

de Campos, Marcos Flavio, and José Adilson de Castro. "Nucleus Size Determination for Nd₂Fe₁₄B, Sm₂Co₁₇, SmCo₅ and BaFe₁₂O₁₉ Magnets." Materials Science Forum 727-728 (August 2012): 151–56. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.151.

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The nucleus size was determined for the following phases: Nd2Fe14B, Sm2Co17, SmCo5and BaFe12O19. These phases are the basis for the most relevant sintered permanent magnets. For the determination, it was assumed a spherical grain, and that the reversal of magnetization occurs in a tiny shell near the surface. The Magnetostatic energy for each domain configuration was found by means of Legendre polynomials. The nucleus is a spherical cap, near the equator. After reaching the nucleus critical size, the reversal of magnetization continues spontaneously, reducing the global energy of the system. I

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38

Kahn, Olivier, Yu Pei, Scott S. Turner, Lahcene Ouahab, and Mohammed Fettouhi. "Chemistry and Physics of Molecular Assemblies Involving Open-Shell Units: From Isolated Molecules to Three Dimensional Magnets." Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 273, no. 1 (1995): 189–201. http://dx.doi.org/10.1080/10587259508031855.

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39

Fan, Xiaodong, Kan Chen, Shuai Guo, et al. "Core–shell Y-substituted Nd–Ce–Fe–B sintered magnets with enhanced coercivity and good thermal stability." Applied Physics Letters 110, no. 17 (2017): 172405. http://dx.doi.org/10.1063/1.4982679.

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40

Ding, Guangfei, Shicong Liao, Jinghui Di, et al. "Microstructure of core-shell NdY-Fe-B sintered magnets with a high coercivity and excellent thermal stability." Acta Materialia 194 (August 2020): 547–57. http://dx.doi.org/10.1016/j.actamat.2020.05.038.

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41

Abelmann, Leon, Tijmen A. G. Hageman, Per A. Löthman, Massimo Mastrangeli, and Miko C. Elwenspoek. "Three-dimensional self-assembly using dipolar interaction." Science Advances 6, no. 19 (2020): eaba2007. http://dx.doi.org/10.1126/sciadv.aba2007.

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Interaction between dipolar forces, such as permanent magnets, generally leads to the formation of one-dimensional chains and rings. We investigated whether it was possible to let dipoles self-assemble into three-dimensional structures by encapsulating them in a shell with a specific shape. We found that the condition for self-assembly of a three-dimensional crystal is satisfied when the energies of dipoles in the parallel and antiparallel states are equal. Our experiments show that the most regular structures are formed using cylinders and cuboids and not by spheroids. This simple design rule

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42

Lottini, E., A. López-Ortega, G. Bertoni, et al. "Strongly Exchange Coupled Core|Shell Nanoparticles with High Magnetic Anisotropy: A Strategy toward Rare-Earth-Free Permanent Magnets." Chemistry of Materials 28, no. 12 (2016): 4214–22. http://dx.doi.org/10.1021/acs.chemmater.6b00623.

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43

Caspi, S., D. R. Dietderich, H. Felice, et al. "Test Results of LARP ${\rm Nb}_{3}{\rm Sn}$ Quadrupole Magnets Using a Shell-Based Support Structure (TQS)." IEEE Transactions on Applied Superconductivity 19, no. 3 (2009): 1221–25. http://dx.doi.org/10.1109/tasc.2009.2017919.

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44

Pokhilko, Pavel, Daniil Izmodenov, and Anna I. Krylov. "Extension of frozen natural orbital approximation to open-shell references: Theory, implementation, and application to single-molecule magnets." Journal of Chemical Physics 152, no. 3 (2020): 034105. http://dx.doi.org/10.1063/1.5138643.

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45

Tan, Chun Ghee, and Robert N. Grass. "Suzuki cross-coupling reactions on the surface of carbon-coated cobalt: expanding the applicability of core–shell nano-magnets." Chemical Communications, no. 36 (2008): 4297. http://dx.doi.org/10.1039/b807741j.

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46

Misra, S., T. Karan, and S. Ram. "Dynamics of Surface Spins in Small Core–Shell Magnets of Li0.35Zn0.30Fe2.35O4 Bonds over a Carbon Surface and Tailored Magnetic Properties." Journal of Physical Chemistry C 119, no. 40 (2015): 23184–95. http://dx.doi.org/10.1021/acs.jpcc.5b04635.

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47

Sharma, Sanjeev Kumar, Shanker Ram, and Debabrata Pradhan. "Small core–shell Mn0.5Bi0.5−Bi (⩽3 at%) magnets, the anisotropic growth of crystallite nanoplates, interface-bridging, and tailored magnetic properties." Nanotechnology 32, no. 4 (2020): 045705. http://dx.doi.org/10.1088/1361-6528/abac7d.

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48

Pa, Pai Shan. "Design of Product Surface Finish via Magnetic-Assistance." Advanced Materials Research 126-128 (August 2010): 463–68. http://dx.doi.org/10.4028/www.scientific.net/amr.126-128.463.

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This paper studies the performance assessment of magnetic-assistance electrochemical finishing using an effective design system and magnetic force to the electrolyte to assist the dregs discharge on zinc alloy beyond die casting by electrochemical finishing as a finish process on the freeform surface of castings. An outer shell of toy vehicle is taken for instance in the experiment. A small distance between the two magnets or large magnetic field intensity provides larger magnetic force and discharge ability. A higher current rating with magnetic-assistance can avoid the difficulty of dreg dis

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49

Früh, W. G. "Using magnetic fluids to simulate convection in a central force field in the laboratory." Nonlinear Processes in Geophysics 12, no. 6 (2005): 877–89. http://dx.doi.org/10.5194/npg-12-877-2005.

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Abstract. Large-scale convection in planetary or stellar interiors plays a significant role but it is difficult to reproduce the central force field of those systems in experimental studies. A technique to approximate a central force field through the magnetic field from magnets acting on a magnetic liquid is presented. The thermomagnetic convection in a spherical shell filled with a magnetic liquid is analyzed in the context of a terrestrial laboratory using a 2D Finite Element model. Two configurations of magnetic fields were investigated, one resulting in a radially decreasing force field,

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Hall, Ryan G., and Reza Rashidi. "Multi-Directional Universal Energy Harvesting Ball." Micromachines 12, no. 4 (2021): 457. http://dx.doi.org/10.3390/mi12040457.

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Abstract:

This paper discusses the development of a multi-directional, universal, electromagnetic energy harvester. The device is a ball consisting of two parts: a rigid spherical core with internal tubes, coils and magnets, and a flexible silicone-based shell holding a carrier fluid. The multi-directional aspect of the design comes from the device’s spherical shape. The harvester generates energy when subject to compressive force, by moving fluid through a tube, pushing a permanently magnetized ball through a coil wound around the tube. A combination of 3-D printed PLA plastic and molded silicone was u

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