Morphology and magnetic properties of FeCo nanocrystalline powder produced by modified mechanochemical procedure

Azizi, Amin; Sadrnezhaad, S.K.; Hasani, Arman

doi:10.1016/j.jmmm.2010.07.004

Cited by 17 publications

(16 citation statements)

References 21 publications

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“…It is well known that soft magnetic FeCo alloys can be made into various kinds of magnetic components such as magnetic rotors and magnetic generators used widely in hightemperature conditions, because of their high saturation magnetization, low coercivity, and high Curie temperature [1][2][3][4]. The traditional FeCo alloys have been usually prepared by mechanical alloying or using methods of smelting with Fe, Co, Ni, and some adding elements under the protection of inert gas, and commonly put to use in bulk materials [5][6][7], while the bulk FeCo materials often show poor mechanical properties due to the brittleness of FeCo phase [8,9].…”

Section: Introductionmentioning

confidence: 99%

Controlled Morphologies and Intrinsic Magnetic Properties of Chemically Synthesized Large-Grain FeCo Particles

Cao

Yang

et al. 2015

J Supercond Nov Magn

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The high-purity FeCo particles with particle size ranging from 100 nm to 5 μm are fabricated using a direct chemical method. The controlled morphologies of the FeCo samples vary from nearly-spherical to urchin-like or cubic shape under optimal reaction conditions. Very slight surface oxidation is observed in these large-grain FeCo particles. It shows a low coercivity with 91 Oe for the nearly-spherical FeCo particles, while a much higher coercivity of 236 Oe is observed in the urchin-like samples, which can be mainly ascribed to their different morphologies and particle sizes. High saturation magnetization of 205-211 A/m 2 /kg can be achieved in these micron-level FeCo particles due to their high purity and single bodycentered cubic (bcc) phase structure. The compositioncontrolled FeCo particles with different Fe/Co atom ratios can be obtained by adjusting the reaction temperature, which results in their variable saturation magnetization. The relative simple and low-cost chemical synthesis of large-grain FeCo particles promise their potential use in complicated shape and miniaturized FeCo-based magnetic components.

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Section: Introductionmentioning

confidence: 99%

Controlled Morphologies and Intrinsic Magnetic Properties of Chemically Synthesized Large-Grain FeCo Particles

Cao

Yang

et al. 2015

J Supercond Nov Magn

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“…NaCl was also used as a salt-matrix to prevent the milled nanoparticles from sintering and welding together during the synthesis process through trapping the nanoparticles into a solid salt-matrix during the cooling step. [ 15,16 ] In addition, we will show that hybrid nanostructures including mixtures of the FeCo/GC nanoparticles and multiwalled carbon nanotubes (MWNTs) or carbon nanorods (CNRs) can be obtained through manipulation of the carbon-bearing gas fl ow rate.…”

Section: Introductionmentioning

confidence: 99%

Tuning Carbon Content and Morphology of FeCo/Graphitic Carbon Core–Shell Nanoparticles using a Salt‐Matrix‐Assisted CVD Process

Azizi

Khosla

Mitchell

et al. 2013

Part & Part Syst Charact

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Large‐scale and tunable synthesis of FeCo/graphitic carbon (FeCo/GC) core–shell nanoparticles as a promising material for multipurpose biomedical applications is reported. The high‐quality graphitic structure of the carbon shells is demonstrated through high‐resolution transmission electron microscopy (HRTEM), X‐ray diffraction (XRD), and Raman spectroscopy. A saturation magnetization of 80.2 emu g−1 is reached for the pure FeCo/GC core–shell nanoparticles. A decrease in the saturation magnetization of the samples is observed with an increase in their carbon content with different carbon morphologies evolved in the process. It is also shown how hybrid nanostructures, including mixtures of the FeCo/GC nanoparticles and multi‐walled carbon nanotubes (MWNTs) or carbon nanorods (CNRs), can be obtained only by manipulation of the carbon‐bearing gas flow rate.

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“…4(b). The possible mechanism of the successful prevention from the particle welding by using salt-matrix is explained in our previous work [16].…”

Section: Resultsmentioning

confidence: 99%

“…Mechanochemical processing has been shown to have advantages over other methods in terms of being controllable and low cost method for production of advanced materials with narrow size distributions [15,16]. Mechanochemical route which is carried out by an abrupt solid-state reaction induced by mechanical milling can be used to synthesize materials with high performance [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Fe50Co50 nanoparticles via self-propagating high-temperature synthesis during milling

et al. 2011

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Morphology and magnetic properties of FeCo nanocrystalline powder produced by modified mechanochemical procedure

Cited by 17 publications

References 21 publications

Controlled Morphologies and Intrinsic Magnetic Properties of Chemically Synthesized Large-Grain FeCo Particles

Controlled Morphologies and Intrinsic Magnetic Properties of Chemically Synthesized Large-Grain FeCo Particles

Tuning Carbon Content and Morphology of FeCo/Graphitic Carbon Core–Shell Nanoparticles using a Salt‐Matrix‐Assisted CVD Process

Fe50Co50 nanoparticles via self-propagating high-temperature synthesis during milling

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