Title :
Coercivity Enhancement of the Nd-Fe-B Sintered Magnets with Grain Boundary Diffused by Dy or Tb Element
Author :
Machida, K. ; Suzuki, S. ; Li, D.
Author_Institution :
Osaka Univ., Suita
Abstract :
In the present study, the enhanced magnetic properties of Nd-Fe-B sintered magnet pieces treated with the Dy or Tb metal as reduced by heating their oxides or fluorides with CaH2 are reported together with the results obtained on the samples simply coated and heated with the oxide or fluoride of Dy and Tb elements and the mechanism for enhancing the coercivity is disscussed to produced much powerful Nd-Fe-B sintered magnets.
Keywords :
alloying additions; boron alloys; coercive force; crystal microstructure; dysprosium alloys; ferromagnetic materials; grain boundary diffusion; heat treatment; iron alloys; neodymium alloys; permanent magnets; sintering; terbium alloys; NdFeBDy; NdFeBTb; coercivity enhancement; grain boundary diffusion; heating; microstructures; sintered magnets; Coatings; Coercive force; Grain boundaries; Heating; Magnetic field measurement; Magnetic properties; Magnets; Powders; Pulse measurements; Temperature;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.374947
