Substitution of Ce for (Nd,Pr) in Melt-Spun (Nd,Pr)–Fe–B Powders.

The effect of Ce substitution for (Nd,Pr) on structure, microstructure, and magnetic properties of [(Nd0.75Pr0.25)1–xCex]11.65Fe82.75B5.6 ( $x=0$ –0.5) melt-spun powders has been studied. It has been found that all Ce-substituted powder samples retain the R2Fe14B ( \textrm {R}=\textrm {Nd} , Pr, Ce) single-phase structure with a similar grain size in the range of 20–22 nm. While Ce substitution leads to lower magnetic properties, lower Curie temperature, and higher flux aging loss in bonded magnets, (Nd,Pr,Ce)–Fe–B melt-spun powders with up to 50% Ce substitution exhibit acceptable overall room-temperature magnetic properties and improved magnetization behavior, and offer a potential low-cost alternative product for low-to-moderate-temperature applications. [ABSTRACT FROM AUTHOR]