Bulk anisotropic nanocrystalline SmCo6.6Ti0.4 permanent magnets

An, Shizhong; Liu, Zheng; Zhang, Tianli; Jiang, Chengbao

doi:10.1016/j.scriptamat.2012.11.015

Cited by 30 publications

(8 citation statements)

References 24 publications

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“…Recently, crystallographically textured SmCo 5 and SmCo 7 nanoflakes were prepared by surfactant-assisted high energy ball milling (HEBM). [8][9][10] The SmCo 5 nanoflakes have attractive magnetic properties; coercivity of up to 21 kOe and maximum energy product of up to 22 MGOe. 9 Thus, the nanoflake powders possess a potential to fabricate anisotropic nanocrystalline SmCo 5 bulk magnets with higher magnetization and higher coercivity.…”

Section: Introductionmentioning

confidence: 99%

“…Anisotropic nanocrystalline SmCo 7 bulk magnets created from nanoflake powders via spark plasma sintering technique were investigated by several researchers. 10,11 However, it is less reported on correlation between nanoflake morphology and final properties of the SmCo 5 bulk magnets. In this study, we prepared SmCo 5 nanoflakes by surfactant-assisted high energy ball milling and fabricated SmCo 5 bulks from these powders by induction hot-pressing.…”

Section: Introductionmentioning

confidence: 99%

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Effect of flake thickness on coercivity of nanocrystalline SmCo5 bulk prepared from anisotropic nanoflake powder

et al. 2016

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In this study, nanocrystalline SmCo5 bulk magnets were prepared by hot-pressing of nanoflake powders fabricated via surfactant-assisted high energy ball milling. Effect of the flake thickness on magnetic coercivity of the SmCo5 bulk was investigated. Anisotropic SmCo5 nanoflakes with thickness between 100 and 1000 nm were prepared by varying the milling parameter of ball-to-powder weight ratio. XRD analysis revealed that as-milled flake powders possessed nanocrystalline grains with no observable oxide peaks. The coercivity of the flake powders varied between 19.9 and 21.3 kOe for 1000 nm to 100 nm thick flakes, which indicated that the flake thickness in this range had no obvious effect on the coercivity of the powders. However, the coercivity of the bulks showed a strong dependence on the flake thickness. The bulk coercivity value of 10.97 kOe corresponding to the flake thickness of 100 nm, was 80% higher compared to the bulk prepared with the flakes of 1000 nm. XRD results on compacted samples did not show any grain growth, however, Sm2O3 and free Co were detected in SmCo5 bulks and their content increased with reduced flake thickness. Interestingly enough the bulk coercivity was not deteriorated with the presence of Sm oxide and Co.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of flake thickness on coercivity of nanocrystalline SmCo5 bulk prepared from anisotropic nanoflake powder

et al. 2016

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“…In addition, the magnetic alignment of the powder in the green compact is important for the magnetic texture of the sintered magnets. 16 Considering the above results, the fact that the surfactant can effectively improve the magnetic texture of the sintered magnets should be primarily due to the flake morphology of the powder milled with surfactant favoring the magnetic alignment.…”

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confidence: 92%

“…[13][14][15] And in our previous work, anisotropic nanocrystalline SmCo magnets were prepared by surfactant-assisted HEBM and spark plasma sintering (SPS). 16 It is known that the technical factors, such as sintering temperature, usually have great effect on the magnetic performance of permanent magnets. However, how the various technical factors in processing influence the magnetic texture and coercivity of anisotropic nanocrystalline SmCo magnets is still not clear.…”

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confidence: 99%

Magnetic texture and coercivity of anisotropic nanocrystalline SmCo6.1Si0.9 magnets

Zhang

Jiang

2014

Journal of Applied Physics

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“…An increasing demand for high-energy density and high temperature applicable magnets has been proposed with the development of modern technology such as aeronautics and electric cars [1][2][3][4][5]. 2:17-type SmCo magnets are suggested to be the best available high temperature magnets because of their strong magnetocrystalline anisotropy, high Curie temperature, and large maximum energy product (BH) max [6][7][8].…”

Section: Introductionmentioning

confidence: 99%