The Effect of the Magnetic Properties of NdFeB Magnets on the Zn or ZnO Intergranular Addition

In this work we have studied the effects of Zn and ZnO addition on grain boundaries in the magnetic properties of NdFeB magnets. Zn and ZnO were added at the grain boundaries by double alloy process. Study on Zn and ZnO were effected of sintered NdFeB permanent magnetic materials .Results show that Zn and ZnO powder were added to grain boundary of improves magnets, coercivityHcj, remanenceBr, maxi-mum magnetic energy (BH)max, Zn was added1.2wt%,ZnO was added 1wt% to the maximum value, continue to add drop。Zn powders were added to the intergranular regions of NdFeB magnets, and their effects on the magnetic properties and corrosion resistance were investigated. In the scanning electron microscope, energy spectrum analysis showed that Zn and ZnO did not appear after entering the new metallographicals, Zn or ZnO distributed in where the main enrich at the Nd-rich phase[1]