Title :
Hot worked Nd-Fe-B permanent magnets: effect of additional element such as Dy, Si, Ce, Ti, Co and others
Author :
Nozieres, J.P. ; de la Bathie, R.Perrier
Author_Institution :
CNRS, Lab., Louis Neel, Grenoble, France
fDate :
9/1/1989 12:00:00 AM
Abstract :
A novel process of permanent magnet preparation has been developed. Coercivity is obtained by breaking grains of the bulk material by hot-working cast ingots of NdFeB alloy. The result is a permanent magnetic material obtained directly from the as-cast alloy. Addition of Al and/or Dy greatly increases coercivity, as observed in sintered magnets. Co is effective in raising the Curie temperature without affecting coercivity. Other additional elements do not improve the magnetic properties
Keywords :
Curie temperature; alloying additions; boron alloys; coercive force; demagnetisation; ferromagnetic properties of substances; hot working; iron alloys; neodymium alloys; permanent magnets; Curie temperature; Nd-Fe-B; NdFeBAl; NdFeBCe; NdFeBCo; NdFeBDy; NdFeBHf; NdFeBMn; NdFeBSi; NdFeBTi; NdFeBZr; coercivity; demagnetisation curves; hot-working; magnetic properties; permanent magnets; sintered magnets; Coatings; Cobalt alloys; Coercive force; Demagnetization; Iron; Magnetic materials; Magnetic properties; Permanent magnets; Superconducting magnets; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
