metal materials; exchange coupled

作者:倪建森,徐晖,朱明原,李强,周邦新,董远达
关键词:metal materials; exchange  coupled; two phase nanocrystalline; bonded permanent magnet; rare earths
单位:Institute of Materials,Institute neodymium standard state
http://www.999magnet.com/products/112-neodymium-standard-state of Materials,Institute of Materials,Institute of Materials,Institute of Materials,Institute of Materials Shanghai University,Shanghai 200072,China









,Shanghai University,Shanghai 200072,China









,Shanghai University,Shanghai 200072,China









,Shanghai University,Shanghai 200072,China









,Shanghai University,Shanghai 200072,China









,Shanghai University,Shanghai 200072,China
摘要:Nanocrystalline Nd    8.5  Fe    75  Co  5Cu  1Zr  3Nb  1B    6.5   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:    B    r=0.68 T (6  8 kGs),       J  H    c=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 Nd  2Fe    14  B 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.