Atom probe study on the bulk nanocomposite SmCo/Fe permanent magnet produced by ball-milling and warm compaction

TitleAtom probe study on the bulk nanocomposite SmCo/Fe permanent magnet produced by ball-milling and warm compaction
Publication TypeJournal Article
Year of Publication2011
AuthorsXiong XY, Rong CB, Rubanov S, Zhang Y, Liu JP
Journal TitleJournal of Magnetism and Magnetic Materials
Volume323
Pages2855-2858
Date Published11
ISBN Number0304-8853
Accession NumberWOS:000292912900026
Abstract

The microstructure and compositions of the bulk nanocomposite SmCo/Fe permanent magnet were studied using transmission electron microscopy and 3-dimensional atom probe techniques. The excellent magnetic properties were related to the uniform nanocomposite structure with nanometer alpha-Fe particles uniformly distributed in the SmCo phase matrix. The alpha-Fe phase contained similar to 26 at% Co, and the SmCo phase contained similar to 19 at% Fe, confirming that the interdiffusion of Fe and Co atoms between the two phases occurred. The formation of the alpha-Fe(Co) phase explained why the saturation magnetization of the nanocomposite permanent magnet was higher than that expected from the original pure alpha-Fe and SmCo(5) powders, which enhanced further the maximum energy product of the nanocomposite permanent magnet. (C) 2011 Elsevier B.V. All rights reserved.

DOI10.1016/j.jmmm.2011.06.035