Self-nanoscaling of the soft magnetic phase in bulk SmCo/Fe nanocomposite magnets
| Title | Self-nanoscaling of the soft magnetic phase in bulk SmCo/Fe nanocomposite magnets |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | Rong CB, Zhang Y, Poudyal N, Szlufarska I, Hebert RJ, Kramer MJ, Liu JP |
| Journal Title | Journal of Materials Science |
| Volume | 46 |
| Pages | 6065-6074 |
| Date Published | 09 |
| Type of Article | Article |
| ISBN Number | 0022-2461 |
| Accession Number | WOS:000291951900019 |
| Keywords | anisotropy, composites, deformation, energy product, GEOMETRY, instability, microstructure, multilayers, permanent-magnets, remanence enhancement |
| Abstract | Fabrication of bulk nanocomposite materials, which contain a magnetically hard phase and a magnetically soft phase with desired nanoscale morphology and composition distribution has proven to be challenging. Here we demonstrate that SmCo/Fe(Co) hard/soft nanocomposite materials can be produced by distributing the soft magnetic alpha-Fe(Co) phase particles homogenously in a hard magnetic SmCo phase matrix through a combination of high-energy ball milling and a warm compaction. Severe plastic deformation during the ball milling results in nanoscaling of the soft phase with size reduction from micrometers to similar to 15 nm. Up to 35% of the soft phase can be incorporated into the composites without coarsening. This process produces fully dense bulk isotropic nanocomposite materials with remarkable energy-product enhancement (up to 300%) owing to effective inter-phase exchange coupling. |
| DOI | 10.1007/s10853-011-5568-7 |
| Alternate Journal | J. Mater. Sci. |
