Improving intergranular phase and enhanced coercivity: A grain boundary diffusion of non-heavy rare earth PrNdAl alloy in sintered Nd-Fe-B magnets oleh Y.L. Huang, Y.F. Yao, F.Y. Wang, H.F. Li, Z.J. Wu, Q. Feng, W. Li, J.M. Luo, Z.S. Pang, C.C. Zhong, Y.H. Hou