Grain boundary restructuring and La/Ce/Y application in Nd–Fe

Grain boundary restructuring and La/Ce/Y application in Nd–Fe–B magnets

Yan Mi^†, Jin Jiaying, Ma Tianyu

(a) Mass loss of (Pr, Nd)_32.5Fe_62.0Cu_5.5 restructured magnets and (Pr, Nd)_14.5Fe_79.5B_6.0 in hot and humid atmosphere. The error bar represents the standard deviation obtained from 5 samples. (b) Potentiokinetic polarization curves in 0.005 M H₂SO₄ aqueous solutions. The insets in (b) are SEM micrographs of the corroded surfaces of (Pr, Nd)_14.5Fe_79.5B_6.0 and 12 wt.% (Pr, Nd)_32.5Fe_62.0Cu_5.5 restructured magnets.^[53]