nanocomposite magnets; melt spinning

作者:王伟,倪建森,徐晖,周邦新,李强,王占勇
关键词:nanocomposite magnets; melt spinning; exchange coupling; rare earths
单位:Institute of Materials, neodymium prices
http://www.999magnet.com/products/142-neodymium-prices Research Center of Nano-Science and Nano-Technology, Shanghai University, Shanghai 200072, China








,Institute of Materials, Research Center of Nano-Science and Nano-Technology, Shanghai University, Shanghai 200072, China








,Institute of Materials, Research Center of Nano-Science and Nano-Technology, Shanghai University, Shanghai 200072, China








,Institute of Materials, Research Center of Nano-Science and Nano-Technology, Shanghai University, Shanghai 200072, China








,Institute of Materials, Research Center of Nano-Science and Nano-Technology, Shanghai University, Shanghai 200072, China








,Institute of Materials, Research Center of Nano-Science and Nano-Technology, Shanghai University, Shanghai 200072, China
摘要:Nd_(11)Fe_(71)Co_8V_(1.5)Cr_1B_(7.5) magnet was prepared by melt-spinning and subsequently annealed. The effects of the wheel speed on the magnetic properties and microstructure were studied. The results reveal that fine nanocomposite microstructure consisting of Nd_2Fe_(14)B and α-Fe phases can be developed at an optimum wheel speed of about 21 m·s~(-1). After optimal annealing (640 ℃×4 min), magnetic properties of B_r=0.64 T, (()_jH_c)=903.5 kA·m~(-1) and (BH)_(max)=71 (kJ·m~(-3)) were obtained for the bonded magnets. The addition of Cr element significantly reduces grain size, increasing the intrinsic coercivity and maximum magnetic energy product.