论文部分内容阅读
Nanocrystalline Nd8.5Fe75Co5Cu1Zr3Nb1B6.5 ribbons were prepared by melt-spun (18 m*s-1) and subsequent heat treatment (670 ℃/4 min). Excellent magnetic properties of the bonded magnet were achieved as follows: Br=0.68 T (6.8 kGs), JHc=620.3 kA*m-1(7.8 kOe), (BH)max=74 kJ*m-3 (9.3 MGOe). The results of TEM photomicrographs confirm that the appearance of α-Fe phase is earlier than that of Nd2Fe14B phase during crystallization process. The addition of Cu and Zr elements shows to be advantageous to the improvement of an intrinsic coercivity and squareness of hysteresis loop, as well as energy product.