- [English]
- Sintering of Nd-Fe-B Magnets from Dy Coated Powder
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Jin Woo Kim, Young Do Kim
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J Korean Powder Metall Inst. 2013;20(3):169-173.
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DOI: https://doi.org/10.4150/KPMI.2013.20.3.169
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 Abstract
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- High-coercive (Nd,Dy)-Fe-B magnets were fabricated via dysprosium coating on Nd-Fe-B powder. The sputtering coating process of Nd-Fe-B powder yielded samples with densities greater than 98%. (Nd,Dy)_2Fe_14B phases may have effectively penetrated into the boundaries between neighboring Nd_2Fe_14B grains during the sputtering coating process, thereby forming a (Nd,Dy)_2Fe_14B phase at the grain boundary. The maximum thickness of the Dy shell was approximately 70 nm. The maximum coercivity of the Dy sputter coated samples(sintered samples) increased from 1162.42 to 2020.70 kA/m. The microstructures of the (Nd,Dy)_2Fe_14B phases were effectively controlled, resulting in improved magnetic properties. The increase in coercivity of the Nd-Fe-B sintered magnet is discussed from a microstructural point of view.
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Citations
Citations to this article as recorded by  - Recovery of Valuable Metals from Acoustic Magnet Swarf Slurry
Wei-Sheng Chen, Li-Pang Wang, Chen-Yao Hung, C.-H. Weng, R. Weerasinghe
E3S Web of Conferences.2018; 53: 04015. CrossRef
- [Korean]
- Shape Control of Platinum Nanoparticles Using a Metal Salt
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Seoung Yeul Kwak, Jin Ho Lee, Jin Woo Kim, Taek Kyun Jung, Young Do Kim
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J Korean Powder Metall Inst. 2012;19(6):393-397.
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DOI: https://doi.org/10.4150/KPMI.2012.19.6.393
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Abstract
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- AgNO_3 has the characteristic is controlling the inhibition or promotion of particle growth by adsorbing onto specific facets of platinum nanoparticles. Therefore, in this study, AgNO_3 was added to control the shape of platinum nanoparticles during the liquid phase reduction process. Consequently, platinum cubes were synthesized when AgNO_3 of 1.1 mol% (with respect to the Pt concentration) was added into the solution. Platinum octahedrons were synthesized when 32 mol% (with respect to the Pt concentration) was added into the solution. These results demonstrate that the metal salt AgNO_3, effectively controlled the relative growth rates of each facet of Pt nano particles.
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