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Abstract Wetting experiments of Tb70Cu30, Pr52.5Tb17.5Cu30, Pr60Tb20Al20 and Pr60Tb10Cu15Al15 (at.%) ingots over Nd-Fe-B sintered magnet were carried out and suggested that alloys containing Al possessed better wettability and mobility. Interfacial… Click to show full abstract
Abstract Wetting experiments of Tb70Cu30, Pr52.5Tb17.5Cu30, Pr60Tb20Al20 and Pr60Tb10Cu15Al15 (at.%) ingots over Nd-Fe-B sintered magnet were carried out and suggested that alloys containing Al possessed better wettability and mobility. Interfacial analysis suggested that at interface between Pr60Tb20Al20 and magnet, Tb mainly diffused along grain boundaries without abnormal Tb-rich grains, which were observed in the systems of Cu-added ingots. On the basis of these, grain boundary diffusion with alloy ribbons was applied and coercivity increment of over 11 kOe was achieved by consuming below 0.5 wt.% Tb in diffused magnet by Pr60Tb10Cu15Al15, which was mainly attributed to homogeneous and thin Tb-rich shells.
Journal Title: Scripta Materialia
Year Published: 2019
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