Nanocrystalline Nd2Fe14B/α-Fe permanent magnet

摘要

Nd8.5Fe75Co5Cu1Zr3Nb 1B6.5 bonded magnet was prepared by melt-spinning (vs=18 m/s) and subsequent heat treatment (670 ℃, 4 min). Excellent magnetic properties of the bonded magnet were achieved: Br=0.68T, iHc=620.3 kA /m, (BH)max=74 kJ/m3. The addition of Cu and Zr elementss hows to bead vantageous in improving an intrinsic coercivity and squareness of hysteresis loop, as well as energy product. It has a remarkable remanence enhancement and the isotropic saturation remanence ratio Mr/Ms is 0.83.