Title :
Effect of minor grain boundary additives on the magnetic properties of NdFeB magnets
Author :
Kim, A.S. ; Camp, F.E.
Author_Institution :
Crucible Res. Centre, Crucible Mater. Corp., Pittsburgh, PA, USA
fDate :
11/1/1995 12:00:00 AM
Abstract :
Cobalt has been known as an element to increase the Curie temperature but to decrease the coercivity of (Nd,Dy)FeB magnets. Because of this negative effect, various elements have been added to increase the coercivity but at the expense of remanence and/or Curie temperature. The combined addition of cobalt and small amounts of copper to (Nd,Dy)FeB alloy was found to substantially increase the coercivity without Br and Tc reduction. As a result, the temperature stability and corrosion resistance have substantially improved without sacrificing any magnetic performance
Keywords :
Curie temperature; alloying additions; boron alloys; coercive force; corrosion protection; dysprosium alloys; ferromagnetic materials; grain boundaries; iron alloys; neodymium alloys; permanent magnets; remanence; (Nd,Dy)FeB magnets; Curie temperatur; NdFeB magnets; coercivity; corrosion resistance; magnetic properties; minor grain boundary additives; remanence; temperature stability; Additives; Cobalt alloys; Coercive force; Copper alloys; Grain boundaries; Magnetic properties; Magnets; Remanence; Stability; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
