Atom probe study on the bulk nanocomposite SmCo/Fe permanent magnet produced by ball-milling and warm compaction
|Title||Atom probe study on the bulk nanocomposite SmCo/Fe permanent magnet produced by ball-milling and warm compaction|
|Publication Type||Journal Article|
|Year of Publication||2011|
|Authors||Xiong XY, Rong CB, Rubanov S, Zhang Y, Liu JP|
|Journal Title||Journal of Magnetism and Magnetic Materials|
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.