Experimental investigation of diffusion behavior between molten Mg and Nd-Fe-B magnets

被引：49

作者：

Chae, Hong Jun ^{[1
,2
]}

Kim, Young Do ^{[2
]}

Kim, Bum Sung ^{[1
]}

Kim, Jeong Gon ^{[3
]}

Kim, Taek-Soo ^{[1
]}

机构：

[1] Korea Inst Ind Technol, Inchon 406840, South Korea

[2] Hanyang Univ, Seoul 133791, South Korea

[3] Incheon Univ, Inchon 406772, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 586卷

关键词：

Nd-Fe-B; Recycling; Liquid metal extraction; Rare-earth elements; Neodymium; RARE-EARTHS; SINTERED MAGNETS; RECOVERY; SCRAP;

D O I：

10.1016/j.jallcom.2013.02.156

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study presents the experimental results of neodymium (Nd) extraction from the Nd-Fe-B magnetic alloy by liquid magnesium (Mg). A sample of Nd-Fe-B alloy was placed in an Fe crucible with pure Mg under an Ar atmosphere and melted by induction heating. In order to identify the reaction mechanism, the effects of melting temperature (993-1073 K) and holding time (2-120 min) on the extraction ability were investigated. The diffusion behavior was analyzed by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) and the constituent phases were characterized by X-ray diffraction (XRD). It was found that Nd from the Nd-Fe-B alloy diffused readily into liquid Mg. The reaction rate was dependent both on temperature and time. This study demonstrates that liquid metal extraction of Nd could be a viable and inexpensive method for recovery of the expensive rare earth element Nd using Mg castings. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：S143 / S149

页数：7

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