Influence of Dysprosium Compounds on the Extraction Behavior of Dy from Nd-Dy-Fe-B Magnet Using Liquid Magnesium

During the liquid metal extraction reaction between a Nd-Dy-Fe-B magnet and Mg, Nd rapidly diffuses out of magnet, whereas Dy is not extracted due to with matrix formation Dy2Fe17 phase. In addition, theDy2O3 phase exists at grain boundaries. Until now, only effect Dy2O3 on has been reported. this study, from was investigated in Mg. The during Mg (RE2Fe14B) first examined using thermodynamical approach confirmed by microstructural analysis. It observed that dominated decomposition 3 h 24 h, followed dominant Comparing activities phase, dominant, as compared Finally, 48 high percentage 93% achieved. As result, concluded acts an obstacle Dy. future, if research control proceeds, it will be great importance advance recycling