The chemical fabrication of heterostructured SmCo5/Fe nanocomposites

Li, Xudong; Zhang, Yongliang; Ma, Zhenhui

doi:10.1007/s10854-022-08859-6

Cited by 3 publications

(1 citation statement)

References 29 publications

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“…This behavior can be explained by the very strong bonding between Ca and O. The affinity of O for Ca is high enough that it was used to reduce rare earth oxides into metals [15,16,25].…”

Section: Resultsmentioning

confidence: 99%

Structural, Microstructural and Magnetic Properties of SmCo5/20wt%Fe Magnetic Nanocomposites Produced by Mechanical Milling in the Presence of CaO

et al. 2022

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In this work, we demonstrate the possibility of using a soluble ceramic material, 5 wt% CaO, as an additive for an SmCo5/20wt%Fe exchange-coupled nanocomposite obtained by mechanical milling in order to inhibit the grain growth of the soft magnetic phase during annealing, which results in a more stable microstructure and an implicit improvement in the hard–soft interphase exchange coupling. Moreover, we show that the additive improves the phase stability of the composite material, reducing the amount of Sm2Co17-type phases formed during the synthesis process, an important aspect because Sm2Co17 is detrimental to the magnetic performance of the SmCo5/20%Fe nanocomposite. These effects are reflected in a nearly 13% increase in the coercive field (Hc) and a 20% increase in the energy product, (BH)max, for the powders produced using CaO as compared to pure SmCo5/20%Fe nanocomposites processed in the same manner.

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“…This behavior can be explained by the very strong bonding between Ca and O. The affinity of O for Ca is high enough that it was used to reduce rare earth oxides into metals [15,16,25].…”

Section: Resultsmentioning

confidence: 99%

Structural, Microstructural and Magnetic Properties of SmCo5/20wt%Fe Magnetic Nanocomposites Produced by Mechanical Milling in the Presence of CaO

et al. 2022

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Structural and magnetic properties of SmCo/Co nanocomposites elaborated using sol–gel auto-combustion strategy

Emira,

Shaaban,

Gelany

et al. 2023

J Mater Sci: Mater Electron

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Sm–Co nanomagnetic material has received much attention recently since it is thought to be the next generation of permanent magnets with potential uses in energy technologies. Here, ethylenediaminetetraacetic acid (EDTA) is utilized for the first time as a fuel source in a sol–gel auto-combustion process to synthesize Sm–Co nanoparticles. Then, reduction–diffusion process strategy followed the auto-combustion pathway. Typically, Sm2O3 and Co3O4 nanoparticles were prepared by combining Sm and Co nitrates with the chelating agent EDTA. The Sm–Co nanocomposites were subsequently created by reductively annealing precursor oxides using calcium powder. To display the temperature-dependent breakdown of the original precursor and determine the correct annealing temperature, TGA was employed to identify the annealing temperature and the precursor products. Additionally, other physical characterization techniques such as XRD, FE-SEM, EDX, and VSM were used for further investigations. Three distinct Sm1Cox compositions with different cobalt ratios (x = 4.0, 3.5, and 2.0) were prepared and studied. The findings demonstrate that the composition Sm1Cox (x = 2.0) led to the formation of hard phases of SmCo5, Sm2Co7, and Sm2Co17. These particles’ morphology reveals that they are made up of nanowires with an average thickness of 25 nm. As well, according to the VSM findings, this composite had the highest coercivity Hc and a maximum squareness ratio Mr/Ms, which were 2161 Oe and 0.57, respectively.

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Enhanced magnetic properties of SmCo/FeCo nanocomposite magnets by doping eutectic Sm-Ni alloy

et al. 2023

Rare Met.

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The chemical fabrication of heterostructured SmCo5/Fe nanocomposites

Cited by 3 publications

References 29 publications

Structural, Microstructural and Magnetic Properties of SmCo5/20wt%Fe Magnetic Nanocomposites Produced by Mechanical Milling in the Presence of CaO

Structural, Microstructural and Magnetic Properties of SmCo5/20wt%Fe Magnetic Nanocomposites Produced by Mechanical Milling in the Presence of CaO

Structural and magnetic properties of SmCo/Co nanocomposites elaborated using sol–gel auto-combustion strategy

Enhanced magnetic properties of SmCo/FeCo nanocomposite magnets by doping eutectic Sm-Ni alloy

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