Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
권호 표지
DOI QR코드

DOI QR Code

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

사마륨-코발트 자성 섬유 제조를 위한 환원 거동 연구 및 환원-확산 공정의 최적화

  • 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)
  • 이지민 (한양대학교 재료화학공학과) ;
  • 김종렬 (한양대학교 재료화학공학과) ;
  • 좌용호 (한양대학교 재료화학공학과)
  • Received : 2019.08.21
  • Accepted : 2019.08.22
  • Published : 2019.08.28
Download PDF
⟨ Previous Next ⟩

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

References

  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. https://doi.org/10.1109/TMAG.2011.2166975
  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. https://doi.org/10.1021/acsami.9b02966
  4. S. H. Kim, J. W. Kim, J. M. Byun and Y. D. Kim: J. Korean Powder Metall. Inst., 22 (2015) 60. https://doi.org/10.4150/KPMI.2015.22.1.60
  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. https://doi.org/10.3389/fchem.2018.00018
  7. T.-Y. Hwang, J. Lee, M. K. Kang, G. Lee, J. Kim and Y.-H. Choa: Appl. Surf. Sci., 475 (2019) 986. https://doi.org/10.1016/j.apsusc.2019.01.030
  8. Y.-I. Lee, D.-H. Jang, K.-H. Sung, K. Lee and Y.-H. Choa: J. Korean Powder Metall. Inst., 23 (2016) 38. https://doi.org/10.4150/KPMI.2016.23.1.38
  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. https://doi.org/10.1007/s12598-016-0873-6
  13. K. H. J. Buschow and R. C. Sherwood: J. Appl. Phys., 49 (1978) 1480. https://doi.org/10.1063/1.324930
  14. Z. Ma, T. Zhang and C. Jiang: RSC Adv., 5 (2015) 89128. https://doi.org/10.1039/C5RA15079E
  15. Y.-I. Lee, D.-H. Jang and Y.-H. Choa: J. Nanosci. Nanotechnol, 16 (2016) 5190. https://doi.org/10.1166/jnn.2016.12269
  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. https://doi.org/10.1021/jo001362s
  18. D. W. Oxtoby, H. P. Gillis and L. J. Butler: Principles of Modern Chemistry, Cengage Learning (2015).
  19. J. Lee, T.-Y. Hwang, H.-B. Cho, J. Kim and Y.-H. Choa: Sci. Rep., 8 (2018) 15656. https://doi.org/10.1038/s41598-018-33973-z
  20. F. H. Spedding: Metallurgical Reviews, 5 (1960) 297. https://doi.org/10.1179/mtlr.1960.5.1.297
  21. M. Nishikawa, E. Kita, T. Erata and A. Tasaki: J. Magn. Magn. Mater., 126 (1993) 303. https://doi.org/10.1016/0304-8853(93)90609-6