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논문 기본 정보

자료유형
학술저널
저자정보
Sun‑Woo Nam (Korea Institute of Industrial Technology) Sang‑Min Park (Korea Institute of Industrial Technology) Do‑Hyang Kim (Yonsei University) Taek‑Soo Kim (Korea Institute of Industrial Technology)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.3
발행연도
2021.1
수록면
538 - 544 (7page)

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초록· 키워드

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The extraction behavior of dysprosium (Dy) in a rapidly solidified Dy–Fe–B alloy system consisting of Dy2Fe14Band Dy6Fe23phases was investigated using the liquid metal extraction (LME) process. Liquid magnesium (Mg) was selected as the solventmetal in LME because it forms intermetallic compounds with Dy but not with iron (Fe) and boron (B) in this process. Thediffusion behavior of Dy was estimated through thermodynamic calculations and subsequently confirmed by process parameterssuch as temperature and reaction time. As the temperature increases, the extraction rate increases and the maximumextraction efficiency is about 74% Dy for 1 h at 1000 °C. As the reaction time increases, we achieved the maximum extractionefficiency of 95% Dy after 24 h at 900 °C. The factor affecting Dy extraction ratio up to 6 h is Dy6Fe23phase, after which theextraction mainly occurs in Dy2Fe14Bphase. Furthermore, the diffusion behavior is described in detail with analysis basedon microstructural and compositional properties. The effects of process parameters on extraction rate are also discussed.

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