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magnetic field assisted ball milling

  • High-Yield Production of Few-Layer Graphene via New

    During the resonance ball milling process, the utilization of magnetic Fe3O4 nanoparticles Although researchers have made great progress in this field, the ball milling method still faces some Mojtaba Ahmadi et al. reported on the hydrothermal-assisted ball milling approach for scalable production of high-quality functionalized MoS2 In this paper, nano-magnetic Cu/Fe/Fe3O4 catalyst was prepared by a new aqueous solution ball milling method assisted by high-frequency electromagnetic field at room temperature. The products were characterized by means of X-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), selected area electron diffraction (SAED), and vibrating sample magnetometer (VSM).

  • The synthesis of Cu/Fe/Fe3O4 catalyst through the aqueous

    In this paper, nano-magnetic Cu/Fe/Fe3O4 catalyst was prepared by a new aqueous solution ball milling method assisted by high-frequency electromagnetic field at room temperature. The products were characterized by means of X-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), selected area electron diffraction (SAED), and vibrating sample magnetometer (VSM). During the resonance ball milling process, the utilization of magnetic Fe3O4 nanoparticles Although researchers have made great progress in this field, the ball milling method still faces some Mojtaba Ahmadi et al. reported on the hydrothermal-assisted ball milling approach for scalable production of high-quality functionalized MoS2

  • Mechanochemical Synthesis of (Sm,Pr) _ 2 (Co,Fe) _ 17

    Anisotropic Sm0.85Pr0.15(Co1-xFex)z alloy powders with x = 0.2-0.5, consisting mostly of the rhombohedral (Sm,Pr)2(Co,Fe)17 compound, were prepared from a mixture of cobalt, ferric oxide and rare earth oxides subjected to high-energy ball-milling in the presence of calcium reducing agent and calcium oxide dispersant. The milling was followed by a short-time annealing and multi-step washing. now, MnAl-based hard magnetic alloys have not been prepared by surfactant-assisted ball milling (SABM) technique yet. As is well known, SABM has drawn great attention recently for the fabrication of high performance anisotropic NdFeB 18,19 and SmCo 20-22 hard magnetic nanoparticles and sub-micro-flakes with controlled particles size and shape.

  • Magnetization and Specific Absorption Rate Studies of Ball

    When a magnetic field is applied, the magnetic nanoparticle experiences a force in the direction of the magnetic field gradient. This force is also transmitted to the surrounding (Co,Fe) nanoparticles by surfactant-assisted ball milling," Journal of Applied Physics, vol. 105, no. 7, Article ID 07A710, 2009. View at Publisher Site Anisotropic bonded magnets are fabricated by surfactant-assisted ball milling in a magnetic field and magnetic field alignment of the milled chip-like nanoparticles of the Sm–Co and Nd–Fe–B

  • Structure and size-dependent properties of NdFeB

    from milling of HDDR powder S K Pal, K Güth, T G Woodcock et al.-Anisotropic bonded magnets fabricated via surfactant-assisted ball milling and magnetic-field processing Narayan Poudyal, Van Vuong Nguyen, Chuan-bing Rong et al.-Recent citations Microstructure, improved magnetic properties, and recoil loops characteristics for MnBi alloys Y.L Mar 17, 2013 · Abstract. In the present study, a magnetic field-assisted milling process was adopted for the fabrication of SmCo 5 /Fe nanocomposites using oleic acid (OA) and multi-walled carbon nanotubes (MWNT) as surfactants. The bare SmCo 5 /Fe powders processed by conventional milling consist of large agglomerates accompanied by amorphization while both the OA and MWNT-coated

  • CiteSeerX — JOURNAL OF PHYSICS D APPLIED PHYSICS

    CiteSeerXDocument Details (Isaac Councill, Lee Giles, Pradeep Teregowda) Anisotropic bonded magnets fabricated via surfactant-assisted ball milling and magnetic-field processing This article has been downloaded from IOPscience. Please scroll down to see the full text article. When a magnetic field is applied, the magnetic nanoparticle experiences a force in the direction of the magnetic field gradient. This force is also transmitted to the surrounding (Co,Fe) nanoparticles by surfactant-assisted ball milling," Journal of Applied Physics, vol. 105, no. 7, Article ID 07A710, 2009. View at Publisher Site

  • Flaky FeSiAl alloy-carbon nanotube composite with tunable

    Oct 20, 2016 · After ball milling for 8 h, a minimum RL value of −42.8 dB at 12.3 GHz was achieved in FeSiAl/MWCNT composite with 2 wt. MWCNT content at a very thin coating thickness of 1.9 mm. CeCo 5 permanent magnetic alloy has been processed by surfactant assisted high energy ball milling. Heptane and oleic acid were used as the solvent and surfactant, respectively. The amount of surfactant used was 50 by weight of the starting powder. The produced particles were deposited on a piece of copper (4 mm in length and width) under a magnetic field of 27 kOe applied along the copper

  • Advanced Materials Vol 29, No 8Wiley Online Library

    A FeGa P(VDF‐TrFE) wire‐shaped magnetoelectric nanorobot is designed and fabricated to demonstrate a proof‐of concept integrated device, which features wireless locomotion and on‐site triggered therapeutics with a single external power source (i.e., a magnetic field), described in article number by Salvador Pané and co‐workers. CeCo 5 permanent magnetic alloy has been processed by surfactant assisted high energy ball milling. Heptane and oleic acid were used as the solvent and surfactant, respectively. The amount of surfactant used was 50 by weight of the starting powder. The produced particles were deposited on a piece of copper (4 mm in length and width) under a magnetic field of 27 kOe applied along the copper

  • Nanostructured Magnetic Materials GroupUTA

    N anoparticles of Fe, Co, FeCo, SmCo and NdFeB systems with sizes smaller than 30 nm and narrow size distribution have been successfully prepared by surfactant-assisted ball milling, which opens a new approach to obtain monodisperse magnetic nanoparticles. SmCo 5 /Fe nanocomposite magnetic powders processed by magnetic field-assisted ball milling with and without surfactant

  • (PDF) SmCo 5 /Fe nanocomposite magnetic powders processed

    SmCo 5 /Fe nanocomposite magnetic powders processed by magnetic field-assisted ball milling with and without surfactant The cast alloy was melt spun and ball milled (with and without magnetic field) to impart microstructural refinement and correlated with the development of coercivity. Coercivity as high as 6500 Oe obtained during magnetic field assisted ball milling due to fine particle size, alignment of particles and strain.

  • Mechanochemical Synthesis of (Sm,Pr) _ 2 (Co,Fe) _ 17

    Anisotropic Sm0.85Pr0.15(Co1-xFex)z alloy powders with x = 0.2-0.5, consisting mostly of the rhombohedral (Sm,Pr)2(Co,Fe)17 compound, were prepared from a mixture of cobalt, ferric oxide and rare earth oxides subjected to high-energy ball-milling in the presence of calcium reducing agent and calcium oxide dispersant. The milling was followed by a short-time annealing and multi-step washing. We prepared CoFe2O4–RGO (RGO reduced graphene oxide) composites by ball-milling without using toxic chemical reagents and high-temperature heat treatment. The exfoliation and reduction of graphite oxide and anchoring of CoFe2O4 nanoparticles on graphene sheets were accomplished in one step. The microstructure of the heterophotocatalyst was characterized by X-ray diffraction, Fourier

  • Emergence of ferromagnetism due to charge transfer in

    Although metal iron, Fe, was generated from the surface of the steel balls by the super-high-energy ball milling of 150 G 6 (Fig. S2), no peak due to iron was observed in the FeTiO 3 sample as A surfactant-assisted ball milling was employed for the processing of SmCo5 and SmCo5/Fe nanopowders in presence of oleic acid as surfactant. An influence of a 140kOe magnetic field

  • (PDF) Multiwalled Carbon Nanotube-Coated SmCo5/Fe Magnetic

    Magnetic Field-Assisted Ball Milling Padmanapan Sarav anan ∗, Partha Ghosal, and V enkatasubramanian Chandrasekaran Defence Metallurgical Research Laboratory, High-energy ball milling has been shown to be a promising method for large-scale fabrication of rare earth–transition metal nanoparticles. In this work, we report crystallographically anisotropic SmCo 5, PrCo 5 and Sm 2 (Co, Fe) 17 nanoparticles (particle size smaller than 10 nm) obtained by surfactant-assisted ball milling and study their size and properties as a function of the milling

  • (PDF) Multiwalled Carbon Nanotube-Coated SmCo5/Fe Magnetic

    Magnetic Field-Assisted Ball Milling Padmanapan Sarav anan ∗, Partha Ghosal, and V enkatasubramanian Chandrasekaran Defence Metallurgical Research Laboratory, High-energy ball milling has been shown to be a promising method for large-scale fabrication of rare earth–transition metal nanoparticles. In this work, we report crystallographically anisotropic SmCo 5, PrCo 5 and Sm 2 (Co, Fe) 17 nanoparticles (particle size smaller than 10 nm) obtained by surfactant-assisted ball milling and study their size and properties as a function of the milling

  • MAIC Magnetically Assisted Impact Coating AVEKA

    MAIC, pronounced "mace," is a patented process used to coat smaller particles onto larger particles or to apply small amounts of liquids onto particles. The system relies on a pounding process in which small magnets in an oscillating magnetic field are fluidized to rapidly force the Corrigendum Anisotropic bonded magnets fabricated via surfactant-assisted ball milling and magnetic-field processing

  • Anisotropic Sm-(Co,Fe) nanoparticles by surfactant

    High-energy ball milling experiments took place in a milling vial with carbon steel balls by using an SPEX 8000M high-energy ball milling machine. The coercivity was found to increase with milling time with values of 2.3 kOe for Sm2 (Co0.8 Fe0.2) 17 and 18.6 kOe for SmCo5 after 4 h of milling. Apr 15, 2010 · Structural and magnetic characterizations show the alignment of the c-axis of the SmCo 5 grains upon the magnetic-field-assisted ball milling, while the grain size was controlled under 15 nm. The formation of the texture may be attributed to the effect of magnetic fields on the grain orientation during the cold welding process during ball milling.

  • Corrigendum Anisotropic bonded magnets fabricated via

    Corrigendum Anisotropic bonded magnets fabricated via surfactant-assisted ball milling and magnetic-field processing now, MnAl-based hard magnetic alloys have not been prepared by surfactant-assisted ball milling (SABM) technique yet. As is well known, SABM has drawn great attention recently for the fabrication of high performance anisotropic NdFeB 18,19 and SmCo 20-22 hard magnetic nanoparticles and sub-micro-flakes with controlled particles size and shape.

  • Anisotropic Sm-(Co,Fe) nanoparticles by surfactant

    Magnetically hard Sm2(Co0.8Fe0.2)17 and SmCo5 nanoparticles have been produced by using surfactant-assisted low- and high-energy ball milling techniques. Surfactants prevent the rewelding of the crashed particles during the milling process. Heptane was used as the milling medium and oleic acid as the surfactant. High-energy ball milling experiments took place in a milling vial with carbon Anisotropic bonded magnets are fabricated by surfactant-assisted ball milling in a magnetic field and magnetic field alignment of the milled chip-like nanoparticles of the Sm–Co and Nd–Fe–B materials. It is found that the application of magnetic fields during the ball milling strengthens the anisotropy of the chips and therefore improves

  • List of manufacturing processesWikipedia

    This section does not cite any sources. Please help improve this section by adding citations to reliable sources.Unsourced material may be challenged and removed. (December 2009) (Learn how and when to remove this template message) Abstract A magnetic field-assisted ball milling has been employed for the preparation of SmCo 5 10 wt Fe nanocomposite powders in the presence of oleic acid as surfactant. Milling experiments were also carried out without using surfactant and the nanocomposite powders so obtained, with and without surfactant, were investigated for their structural and magnetic properties using SEM, XRD, VSM

  • Preparation of Nanoscale Sm2Co17 Flakes by Ball Milling in

    A surfactant-assisted ball milling was employed for the processing of SmCo5 and SmCo5/Fe nanopowders in presence of oleic acid as surfactant. An influence of a 140kOe magnetic field A magnetic field-assisted ball milling has been employed for the preparation of SmCo 5 10wt Fe nanocomposite powders in the presence of oleic acid as surfactant. Milling experiments were also carried out without using surfactant and the nanocomposite powders so obtained, with and without