Influence of DyF3 addition in the grain boundary on the magnetic properties and corrosion resistance of NdFeB magnets
XU Fang1��DONG Xian-ping2
��1. Department of Materials Sciences and Manufacturing Processes��Aero Engine Corporation of China Commercial Aircraft Engine Co.�� Ltd.�� Shanghai 201108�� China 2. School of Materials Science and Engineering�� Shanghai Jiao Tong University��Shanghai 200240�� China��
Abstract��The influence of DyF3 addition on magnetic properties and corrosion resistance properties of ��Nd0.8Pr0.2��15.5FebalB6 magnets was investigated by scanning electron microscope�� electrochemical corrosion and magnetic test. The results showed that coercivity ��Hcj�� and self-corrosion potential ��Ecorr�� of the magnet with 0.5��1% DyF3 addition were increased�� and the polarization current density ��Icorr�� was much lower than that of the magnet without additives when there are the same anode potential. It revealed that intergranular addition of DyF3 could improve the corrosion resistance of ��Nd0.8Pr0.2��15.5FebalB6 magnets. Furthermore�� the microstructure of magnets after DyF3 addition also indicated the improvement of magnetic properties and corrosion resistance of magnets were improved by ROF intergranular phase.
�� ��������ƽ. �������DyF3���ս�NdFeB��������ܺ���ʴ��Ӱ��[J]. �й������ڿ���, 2017, 35(2): 21-23.
XU Fang��DONG Xian-ping. Influence of DyF3 addition in the grain boundary on the magnetic properties and corrosion resistance of NdFeB magnets. Chinese Journal of Iron and Steel, 2017, 35(2): 21-23.
2017, Vol. 35 
