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http://dx.doi.org/10.4150/KPMI.2019.26.4.334

Study on the Optimization of Reduction Conditions for Samarium-Cobalt Nanofiber Preparation  

Lee, Jimin (Department of Material Science and Chemical Engineering, Hanyang University)
Kim, Jongryoul (Department of Material Science and Chemical Engineering, Hanyang University)
Choa, Yong-Ho (Department of Material Science and Chemical Engineering, Hanyang University)
Publication Information
Journal of Powder Materials / v.26, no.4, 2019 , pp. 334-339 More about this Journal
Abstract
To meet the current demand in the fields of permanent magnets for achieving a high energy density, it is imperative to prepare nano-to-microscale rare-earth-based magnets with well-defined microstructures, controlled homogeneity, and magnetic characteristics via a bottom-up approach. Here, on the basis of a microstructural study and qualitative magnetic measurements, optimized reduction conditions for the preparation of nanostructured Sm-Co magnets are proposed, and the elucidation of the reduction-diffusion behavior in the binary phase system is clearly manifested. In addition, we have investigated the microstructural, crystallographic, and magnetic properties of the Sm-Co magnets prepared under different reduction conditions, that is, $H_2$ gas, calcium, and calcium hydride. This work provides a potential approach to prepare high-quality Sm-Co-based nanofibers, and moreover, it can be extended to the experimental design of other magnetic alloys.
Keywords
Sm-Co alloy powder; Permanent magnet; Nanofiber; Electrospinning; Metallothermic reduction;
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  • Reference
1 S. Zhang and D. Zhao: Advances in Magnetic Materials: Processing, Properties, and Performance, CRC Press (2017).
2 J. M. D. Coey: IEEE Trans. Magn., 47 (2011) 4671.   DOI
3 J. Lee, J. Kim, D. Kim, G. Lee, Y. B. Oh, T. Y. Hwang, J. H. Lim, H. B. Cho, J. Kim and Y. H. Choa: ACS Appl. Mater. Interfaces, 11 (2019) 26222.   DOI
4 S. H. Kim, J. W. Kim, J. M. Byun and Y. D. Kim: J. Korean Powder Metall. Inst., 22 (2015) 60.   DOI
5 Y. Hou and D. J. Sellmyer: Magnetic Nanomaterials: Fundamentals, Synthesis and Applications, Wiley (2017).
6 J. Lee, T.-Y. Hwang, M. K. Kang, H.-B. Cho, J. Kim, N. V. Myung and Y. -H. Choa: Front. Chem., 6 (2018) 18.   DOI
7 T.-Y. Hwang, J. Lee, M. K. Kang, G. Lee, J. Kim and Y.-H. Choa: Appl. Surf. Sci., 475 (2019) 986.   DOI
8 Y.-I. Lee, D.-H. Jang, K.-H. Sung, K. Lee and Y.-H. Choa: J. Korean Powder Metall. Inst., 23 (2016) 38.   DOI
9 C. K. Gupta and N. Krishnamurthy: Miner. Metall. Process., 30 (2013) 38.
10 E. Machlin: An Introduction to Aspects of Thermodynamics and Kinetics Relevant to Materials Science, Elsevier Science (2010).
11 S. M. Yoon: M. S. Thesis, Hanyang University, Seoul (2013).
12 Z. H. Ma, T. L. Zhang, H. Wang and C. B. Jiang: Rare Met., 37 (2018) 1021.   DOI
13 K. H. J. Buschow and R. C. Sherwood: J. Appl. Phys., 49 (1978) 1480.   DOI
14 Z. Ma, T. Zhang and C. Jiang: RSC Adv., 5 (2015) 89128.   DOI
15 Y.-I. Lee, D.-H. Jang and Y.-H. Choa: J. Nanosci. Nanotechnol, 16 (2016) 5190.   DOI
16 M. Saito, H. Fujiwara, J. Mizuno and T. Homma: Meeting Abstracts, The Electrochemical Society (2006) 1278.
17 S. Talukdar and J.-M. Fang: J. Org. Chem., 66 (2001) 330.   DOI
18 D. W. Oxtoby, H. P. Gillis and L. J. Butler: Principles of Modern Chemistry, Cengage Learning (2015).
19 F. H. Spedding: Metallurgical Reviews, 5 (1960) 297.   DOI
20 J. Lee, T.-Y. Hwang, H.-B. Cho, J. Kim and Y.-H. Choa: Sci. Rep., 8 (2018) 15656.   DOI
21 M. Nishikawa, E. Kita, T. Erata and A. Tasaki: J. Magn. Magn. Mater., 126 (1993) 303.   DOI