Title :
Solidification structures and magnetic properties of NdFeB alloys produced by twin-roller quenching technique
Author :
Grunberger, W. ; Schmidt, M. ; Springmann, B.
Author_Institution :
Inst. fur Festkorper und Werkstofforschung e.V., Dresden, Germany
fDate :
3/1/1994 12:00:00 AM
Abstract :
The relationship between microstructures and magnetic properties of NdFeB ribbons or flakes produced by twin-roller quenching was investigated. Dependent on the process parameters magnetically isotropic cell structures or anisotropic columnar structures were obtained. The magnetic properties of the columns did not meet the expectations. High press forces on the rollers did not improve the anisotropy of the partially pulverized flakes. The results are discussed in terms of constitutional conditions and deformation mechanisms
Keywords :
boron alloys; crystal microstructure; deformation; ferromagnetic properties of substances; iron alloys; magnetic anisotropy; magnetostriction; neodymium alloys; permanent magnets; quench hardening; NdFeB; anisotropic columnar structures; deformation mechanism; high press forces; microstructures; partially pulverized flakes; solidification structures; twin-roller quenching; Anisotropic magnetoresistance; Argon; Magnetic anisotropy; Magnetic properties; Microstructure; Optical microscopy; Orifices; Powders; Pulse measurements; Scanning electron microscopy;
Journal_Title :
Magnetics, IEEE Transactions on
