Effect of selective Co addition on magnetic properties of Nd-2(FeCo)(14)B/alpha-Fe nanocomposite magnets

TitleEffect of selective Co addition on magnetic properties of Nd-2(FeCo)(14)B/alpha-Fe nanocomposite magnets
Publication TypeJournal Article
Year of Publication2013
AuthorsRong CB, Wang DP, Nguyen VV, Daniil M, Willard MA, Zhang Y, Kramer MJ, Liu JP
Journal TitleJournal of Physics D-Applied Physics
Volume46
Pages045001
Date Published01
Type of ArticleArticle
ISBN Number0022-3727
Accession NumberWOS:000313591300003
Keywordsalloys, energy product, ENHANCEMENT, fe, interface structure, permanent-magnets, substitution, systems
Abstract

Nd2Fe14B/alpha-Fe-based hard/soft nanocomposite magnets with Co addition have been prepared by ball-milling and warm compaction. It was found that Co addition into the magnetically hard phase improves magnetic properties significantly, especially the remanence ratio and coercivity. The effect on the magnetic properties of the selective Co addition may be attributed to enhanced interdiffusion across the hard/soft interface that improves the interface conditions for effective interphase exchange coupling. By optimizing the Co content in the Nd15Fe79-xCoxB6 hard phase, an energy product value about 21 MG Oe can be obtained in the isotropic Nd-2(FeCo)(14)B/alpha-(FeCo) nanocomposite magnets compared with 15 MG Oe of Nd2Fe14B/alpha-Fe nanocomposite magnets prepared under the same conditions with the same grain size and microstructure, owing to the strengthened intergranular exchange interactions.

URL<Go to ISI>://WOS:000313591300003
DOI10.1088/0022-3727/46/4/045001