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Abstract 0.2 at.%Nb doping to a Nd 12.83 Fe 76.7 Co 4.50 Ga 0.53 B 5.44 alloy suppress the surface crystallization in melt-spun ribbon, thereby suppressing the formation of non-oriented grains… Click to show full abstract
Abstract 0.2 at.%Nb doping to a Nd 12.83 Fe 76.7 Co 4.50 Ga 0.53 B 5.44 alloy suppress the surface crystallization in melt-spun ribbon, thereby suppressing the formation of non-oriented grains during the hot-deformation process to form bulk anisotropic magnet, which leads to the enhancement of remanence. High resolution transmission electron microscopy and three-dimension atom probe tomography revealed that the segregation of Nb at the grain boundaries hinders the grain growth during the hot-deformation process, thereby reducing the size and the aspect ratio of Nd 2 Fe 14 B grains and increasing coercivity.
Journal Title: Scripta Materialia
Year Published: 2018
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