Title :
Effects of Dy on magnetic properties of a-Fe/Nd2Fe14B type alloy
Author :
Kim, S.G. ; Kim, M.J. ; Ryu, K.S. ; Kim, Y.B. ; Kim, C.S. ; Kim, T.K.
Author_Institution :
Korea Res. Inst. of Stand. & Sci., Taejon, South Korea
fDate :
9/1/1999 12:00:00 AM
Abstract :
The effects of Dy content on magnetic and microstructural properties of melt-spun (Nd1-xDyx)4(Fe0.9 Co0.1)86B6Nb3Cu alloys have been investigated. The energy product of the alloys decreases with the increase of Dy content, while the coercivity increases up to 2.64 kOe at x=0.3. At a fixed annealing time condition, the optimum annealing temperature increases by Dy substitution, and grain coarsening occurs in the alloys with high Dy content. The deterioration of hard magnetic properties by Dy substitution is due to the decrease of exchange interaction between a-Fe and (Nd,Dy)2Fe14B phases by grain coarsening
Keywords :
amorphous magnetic materials; annealing; boron alloys; cobalt alloys; coercive force; copper alloys; dysprosium alloys; exchange interactions (electron); ferromagnetic materials; grain growth; iron; iron alloys; neodymium alloys; niobium alloys; permanent magnets; Dy content; Dy effects; Fe-(NdDy)4(FeCo)86B6Nb3 Cu; a-Fe/Nd2Fe14B type alloy; annealing; annealing temperature; coercivity; energy product; exchange interaction; grain coarsening; hard magnetic properties; magnetic properties; melt-spun (Nd1-xDyx)4(Fe0.9Co 0.1)86B6Nb3Cu alloys; microstructural properties; Annealing; Cobalt alloys; Coercive force; Copper alloys; Elementary particle exchange interactions; Iron; Magnetic properties; Neodymium; Niobium alloys; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
