High Performance R-Fe-B Die-Upset Magnets Based on Misch-Metal Alloys

Nd-Fe-B permanent magnets have been widely used in many fields because of their outstanding magnetic properties [1] . However, Pr,Nd and Dy are now considered to be critical elements due to an increasing demand. Therefore, researchs on substitution of Pr-Nd by Ce or misch-metal alloys (MM) are attracting renewed attention because of their potential applications in permanent magnets [2] [3] . The intrinsic magnetic properties of La2Fe14B and Ce2Fe14B are far inferior to those of Nd2Fe14B, so it is hard to acheive high performance R-Fe-B magnets based on misch-metal which contains a majority of La and Ce elements through conventional methods.