Textured resin-bonded Sm(Co,Fe,Cu)5 nanostructured magnets exploiting magnetic field and surfactant-assisted milling

Saravanan, P.; Gopalan, R.; Priya, R.; Ghosal, Partha; Chandrasekaran, V.

doi:10.1016/j.jallcom.2008.09.211

Cited by 31 publications

(15 citation statements)

References 27 publications

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“…Recently, several studies were reported on an approach to fabricate anisotropic micrometre or submicrometre scale particles containing aligned nanoscaled grains by magneticfield and SABM [144,147,[183][184][185]. The surfactants help to reduce the particle size, while the magnetic field improves the grain alignment of the particles.…”

Section: Effect Of Magnetic Field During Ball Millingmentioning

confidence: 99%

Advances in nanostructured permanent magnets research

Poudyal¹,

Liu²

2012

J. Phys. D: Appl. Phys.

249

142

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This paper reviews recent developments in research in nanostructured permanent magnets (hard magnetic materials) with emphasis on bottom-up approaches to fabrication of hard/soft nanocomposite bulk magnets. Theoretical and experimental findings on the effects of soft phase and interface conditions on interphase exchange interactions are given. Synthesis techniques for hard magnetic nanoparticles, including chemical solution methods, surfactant-assisted ball milling and other physical deposition methods are reviewed. Processing and magnetic properties of warm compacted and plastically deformed bulk magnets with nanocrystalline morphology are discussed. Prospects of producing bulk anisotropic hard/soft nanocomposite magnets are presented.

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Section: Effect Of Magnetic Field During Ball Millingmentioning

confidence: 99%

Advances in nanostructured permanent magnets research

Poudyal¹,

Liu²

2012

J. Phys. D: Appl. Phys.

249

142

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“…In the SmCo 7 -or SmCo 5 -type magnets, the intensity of (002) plane is considered as measure of texture. For the ribbon with x = 0.20, the intensity ratio I (002) /I (111) is 4.04 which is much higher than 3.2 for SmCo 7 Ti and 2.9 for SmCo 5 magnets [11]. This indicates that the addition of Cr 3 C 2 may favor the alignment of SmCo 7 crystalline grains during melt spinning.…”

Section: Resultsmentioning

confidence: 91%

Amorphization, Crystallization, and Magnetic Properties of Melt-Spun SmCo7−x(Cr3C
Li
¹
,
Xie
²

2011
Journal of Metallurgy
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0
0
0
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Effects of Cr3C2 content and wheel surface speed on the amorphous formation ability and magnetic properties have been investigated for melt-spun SmCo7−x(Cr3C2)x (x=0.10-0.25) alloys. Ribbon melt-spun at lower wheel speed (30 m/s) has composite structure composed of mostly SmCo7, a small amount of Sm2Co17, and residual amorphous phases. The grain size of SmCo7 phase decreases with the increase of Cr3C2 content x. When melt spinning at 40 m/s, SmCo7−x(Cr3C2)x alloys can be obtained in the amorphous state for 0.15≤x≤0.25 with intrinsic coercive Hci of the order of 40–70 Oe. DSC analysis reveals that SmCo7 phase first precipitates from the amorphous matrix at 650∘C, followed by the crystallization of Sm2Co17 phase at 770∘C. Optimal coercivity Hci of 7.98 kOe and remanent magnetization Mr of 55.05 emu/g have been realized in SmCo6.8(Cr3C2)0.20 magnet subjected to melt spinning at 40 m/s and annealing at 650∘C for 5 min. The domain structure of the annealed ribbon is composed of interaction domains typically 100–400 nm in size, which indicates the presence of a strong exchange coupling between the grains.

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“…It should be mentioned that the phenomenon that the continuously increasing H c without falling with the increasing milling time is different from the most reports of the SABM experiments, [8][9][10][11][12][13] but also agree with these reports. 2,14 The possible reason is that the reasonable SABM power prevents the nanoflakes further decrease and amorphorization. The smaller thickness and amorphorization of nanoflakes possibly decrease the H c .…”

Section: Resultsmentioning

confidence: 99%

Textured PrCo5 nanoflakes with large coercivity prepared by low power surfactant-assisted ball milling

Zuo

Liu

Zheng

et al. 2014

Journal of Applied Physics

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Preparation and magnetic properties of bulk nanostructured PrCo5 permanent magnets with strong magnetic anisotropyThe effect of the milling time on the structure, morphology, coercivity, and remanence ratio of textured PrCo 5 nanoflakes produced by low power surfactant-assisted ball milling (SABM) was investigated. The X-ray powder diffraction (XRD) patterns indicate that the SABM PrCo 5 samples are all CaCu 5 -type hexagonal structure. The average grain size is smaller than 10 nm when the SABM time is equal to or longer than 5.5 h. The thickness of nanoflakes is mainly in the range of 50À100 nm while the length is 0.5À5 lm when the SABM time reaches 8 h. For the field-aligned PrCo 5 nanoflakes, the out-of-plane texture is indicated from the increasing (0 0 l) peaks in the XRD patterns, and the easy magnetization direction is perpendicular to the flake surface. The strong texture of PrCo 5 nanoflakes leads to a large coercivity H c (7.8 kOe) and obvious anisotropic magnetic behaviors for the aligned samples. V C 2014 AIP Publishing LLC.

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Textured resin-bonded Sm(Co,Fe,Cu)5 nanostructured magnets exploiting magnetic field and surfactant-assisted milling

Cited by 31 publications

References 27 publications

Advances in nanostructured permanent magnets research

Advances in nanostructured permanent magnets research

Amorphization, Crystallization, and Magnetic Properties of Melt-Spun SmCo7−x(Cr3C
Li
¹
,
Xie
²

2011
Journal of Metallurgy
0
0
0
0
View full text Add to dashboard Cite

Textured PrCo5 nanoflakes with large coercivity prepared by low power surfactant-assisted ball milling

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Textured resin-bonded Sm(Co,Fe,Cu)5 nanostructured magnets exploiting magnetic field and surfactant-assisted milling

Cited by 31 publications

References 27 publications

Advances in nanostructured permanent magnets research

Advances in nanostructured permanent magnets research

Amorphization, Crystallization, and Magnetic Properties of Melt-Spun SmCo7−x(Cr3CLi1, Xie2 2011Journal of Metallurgy0000View full textAdd to dashboardCite

Textured PrCo5 nanoflakes with large coercivity prepared by low power surfactant-assisted ball milling

Contact Info

Product

Resources

About

Amorphization, Crystallization, and Magnetic Properties of Melt-Spun SmCo7−x(Cr3C
Li
¹
,
Xie
²

2011
Journal of Metallurgy
0
0
0
0
View full text Add to dashboard Cite