High temperature magnetic properties of SmCo5/alpha-Fe(Co) bulk nanocomposite magnets

TitleHigh temperature magnetic properties of SmCo5/alpha-Fe(Co) bulk nanocomposite magnets
Publication TypeJournal Article
Year of Publication2012
AuthorsRong CB, Poudyal N, Liu XB, Zhang Y, Kramer MJ, Liu JP
Journal TitleApplied Physics Letters
Volume101
Pages152401
Date Published10
Type of ArticleArticle
ISBN Number0003-6951
Accession NumberWOS:000310304900046
KeywordsCOERCIVITY, CU, dependence, fe, mechanism, permanent-magnets, sm(co
Abstract

To find alternative high temperature magnets containing no heavy rare earths for power applications, SmCo5/Fe bulk nanocomposite magnets with enhanced energy density and high thermal stability have been produced by using a ball-milling plus warm-compaction route. Up to 30% of the Fe soft magnetic phase has been added to the composites with grain size <20 nm distributed homogenously in the matrix of the SmCo5 hard magnetic phase. It was observed that the microstructure does not change with temperature up to 500 degrees C. It is also observed that the thermal stability of bulk nanocomposite samples is closely related to bulk density. Energy products above 11 MGOe have been obtained at 300 degrees C in fully dense bulk SmCo5/Fe nanocomposite magnets, which is 65% higher than that of a single-phase counterpart at the same temperature. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4758480]

URL<Go to ISI>://WOS:000310304900046
DOI10.1063/1.4758480
Alternate JournalAppl. Phys. Lett.