Characteristics of method for directly molding melt-spun powder with laminated steel core

摘要

Exchange-coupled nano-composite melt-spunpowder is a nano-structured composite of soft magnetic phasesand hard magnetic phases mutually coupled by exchangeinteraction at the grain boundaries. Its resource balance andoxidizability the better than those of Nd_2Fe_(14)Bstoichiometric composition melt-spun powder, because itcontains a smaller proportion of rare-earth elements such as neodymium.A permanent magnet rotor (SPM: surface permanent magnet/IPM: interior permanent magnet) was developed by directlymolding this melt-spun powder with a laminates steel core, and apossible application was found to high-efficiency IMP motors,which use properties to peculiar the nano-composite melt-spun powder.