Structural and Magnetic Characterization of High Performance Die-Upset Forged Nd-Fe-B Magnets
The processing method of anisotropic Nd-Fe-B magnets, based on rapid solidification of a molten alloy, followed by hot pressing and die-upset forging is currently well established and commonly used for the processing of high performance magnets. In this method uniaxial stress, created in an isotropic, polycrystalline alloy, leads to texture formation with the crystallographic c axis, of the tetragonal structure in each grain, being parallel, to the deformation direction (DD). However, the mechanisms leading to the anisotropic structure and accompanying processes are still not fully understood. In this study the Fe73.7Nd13.6Co6.6Ga0.6B5.5 alloy, after rapid solidification by melt spinning and hot pressing was subjected to die-upset forging with strains 30％ and 65％, respectively. Systematic studies of the structure, microstructure and magnetic domain structure versus processing parameters were performed for this alloy, using magnetic measurements, transmission electron microscopy and atomic force microscopy.
Nd-Fe-B magnet die-upset forging anisotropic magnet
Daniela Derewnicka Martin Leonowicz Michal Wozniak
Institute of Precision Mechanics, Warsaw, Poland Faculty of Materials Science and Engineering, Warsaw University of Technology, Poland
国际会议
北京
英文
259-264
2006-08-29（万方平台首次上网日期，不代表论文的发表时间）