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

Azizi, Amin; Yourdkhani, Amin; Koohestani, Hassan; Sadrnezhaad, S.K.; Asmatulu, Ramazan

doi:10.1016/j.powtec.2010.12.030

Cited by 12 publications

(6 citation statements)

References 22 publications

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“…Accordingly, the formation of FeAl is reported to require 100 hours of MA [32]. In another work, Azizi et al [33] have reported the formation of Fe 50 Co 50 to have taken 30 minutes of MA.…”

Section: Methodsmentioning

confidence: 99%

Evolution of microstructural and mechanical properties of nanocrystalline Co₂FeAl Heusler alloy prepared by mechanical alloying

et al. 2013

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Mechanical alloying (MA) has been used to fabricate the Co 2 FeAl Heusler alloy with a nanocrystalline structure. The formation mechanism of the alloy has been investigated.Rietveld analysis showed that all samples that were milled for more than 15 hours had an L2 1 structure with a space group of Fm3m. The crystallite size and internal strain of the samples were calculated using the Williamson-Hall equation. With mechanical alloying of up to 20 hours the crystallite size of Co 2 FeAl increased, after which the crystallite size started to decrease. In contrast, internal strain first decreased during the process and then increased with the increase of milling time. The powder obtained after 20 hours of MA was split into three parts and separately annealed at 300, 500 and 700 o C for 5 hours. A considerable increase was observed in the hardness value of powder particles with the increase of annealing temperature up to 500 o C. However, the hardness value of the sample annealed at 700 o C decreased. It seems that this feature is related to parameters such as increase of crystallite size, enhancement of lattice ordering, change in density of defects and impurities and nonstoichiometric effects.

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Section: Methodsmentioning

confidence: 99%

Evolution of microstructural and mechanical properties of nanocrystalline Co₂FeAl Heusler alloy prepared by mechanical alloying

et al. 2013

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“…[ 1,2 ] Among various magnetic nanoparticles that have been studied for potential biomedical applications, FeCo nanoparticles are promising candidates because of their high saturation magnetization and high Curie temperature. [3][4][5] However, the ease of oxidation, dissolution in acidic environments, and potential toxicity of these materials in their native state restrict their use in biomedical applications. [ 3,6,7 ] A graphitic surface coating not only would address each of these issues, thereby rendering them biocompatible and improving their thermal stability but also would act as a powerful link to covalently attach organic molecules (i.e., drugs) to the magnetic cores.…”

Section: Introductionmentioning

confidence: 99%

“…Magnetic nanoparticles have been widely studied in the recent years for different potential applications, including magnetic recording media, biomedical, and biosensing applications . Among various magnetic nanoparticles that have been studied for potential biomedical applications, FeCo nanoparticles are promising candidates because of their high saturation magnetization and high Curie temperature . However, the ease of oxidation, dissolution in acidic environments, and potential toxicity of these materials in their native state restrict their use in biomedical applications .…”

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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“…The relation between the properties and the grain size is a very important issue in magnetic materials. In the case of soft magnetic materials, the area under the hysteresis curve significantly decreases with reducing the size of grains even if it can be disappeared completely [11,12].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effect of Ultrasound Intensity on the Magnetic Properties of Magnetite Nanostructures Synthesized by Sonochemical Method

Hassanjani-Roshan,

Vaezi,

Koohestani

et al. 2023

IJE

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In this article, the synthesis of magnetite nanostructures was successfully carried out by the sonochemical process. In this method, stoichiometric amount of iron chlorides (FeCl3.6H2O and FeCl2.4H2O), ammonia (NH3) and polyvinylpyrolidone (PVP) were used to synthesize pure Fe3O4 nanoparticles. The effect of initial sonication power of the ultrasonic device on the size and morphology of the final products as one of the effective parameters was investigated. For this, the initial power of the sonicator was evaluated at 90, 70, 50 and 30 W at 40°C. Characterization of Fe3O4 nanoparticles was done by transmission electron microscope (TEM) and X-ray powder diffraction (XRD) and its magnetic properties were investigated by vibrating sample magnetometer (VSM). Investigation of the XRD pattern after annealing showed that pure Fe3O4 phase was successfully formed during the sonochemical process. TEM images determined the size of Fe3O4 nanoparticles to be 10-50 nm. The results showed that increasing the initial power of the system reduced the particle size and improved the magnetic properties of nanoparticles.

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

Cited by 12 publications

References 22 publications

Evolution of microstructural and mechanical properties of nanocrystalline Co₂FeAl Heusler alloy prepared by mechanical alloying

Evolution of microstructural and mechanical properties of nanocrystalline Co₂FeAl Heusler alloy prepared by mechanical alloying

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

Investigating the Effect of Ultrasound Intensity on the Magnetic Properties of Magnetite Nanostructures Synthesized by Sonochemical Method

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

Cited by 12 publications

References 22 publications

Evolution of microstructural and mechanical properties of nanocrystalline Co2FeAl Heusler alloy prepared by mechanical alloying

Evolution of microstructural and mechanical properties of nanocrystalline Co2FeAl Heusler alloy prepared by mechanical alloying

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

Investigating the Effect of Ultrasound Intensity on the Magnetic Properties of Magnetite Nanostructures Synthesized by Sonochemical Method

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Evolution of microstructural and mechanical properties of nanocrystalline Co₂FeAl Heusler alloy prepared by mechanical alloying

Evolution of microstructural and mechanical properties of nanocrystalline Co₂FeAl Heusler alloy prepared by mechanical alloying