Orientation textures of grains and boundary planes in a hot deformed SmCo5 permanent magnet

Distribution of boundary planes in a (La0.67Nd0.33)B6polycrystalline bulk prepared by spark plasma sintering

“…5). Furthermore, considering the reactive liquid-phase spark plasma sintering process used in this work, which is performed under a reduced sintering temperature and with a much shorter holding time, 14,31 the energy anisotropy in the studied bulk might correspond to the non-steady state of relative areas of the referred boundaries, since the IJLa 0.67 Nd 0.33 )B 6 polycrystals did not go through a full grain growth procedure.…”

“…In view of the research background as mentioned above, we have made experimental developments in the mixing techniques in LaB 6 , 3,4 for example, mixing of samarium with lanthanum atoms at 40% concentration would produce a reduction in work function, and we expect the same would hold true in neodymium-mixed LaB 6 . We also have made characterizational developments in the orientation texture measurement of crystallographic planes in rare-earth-based polycrystalline structures with the key stereological approach named the "five parameter analysis (FPA)" method, 14 which is based on the electron backscatter diffraction (EBSD) technique, and estimated the types and relative frequency of boundaries as a function of three Eulerian angle parameters (to describe the lattice misorientation across a boundary plane) and two spherical angle parameters (to describe the orientation of that boundary plane), 15 and the validity of the FPA method has been widely reported in a broad range of crystal symmetries. 16 Therefore, the current work attempts to comprehensively characterize the distribution features of interfaces (including grain boundaries as well as phase boundaries) in a typical Nd-mixed LaB 6 specimen via the FPA method, and is expected to provide beneficial clues for structure-property studies of rare-earth-based emitting materials.…”

Grain boundary plane distribution and its potential correlation with magnetic properties in hexagonal RCo5 permanent magnets

“…Here, the connection might tentatively be called "grain boundary magnetism distribution" (GBMD) because it takes the orientation texture between crystals into account. The misorientation in RCo 5 permanent magnets has been proven to be inhomogeneous, [3][4][5][6] and the authors hereby further propose the principle of "concrete analysis to concrete boundary planes" during GBPD studies. Some important examples are as follows:…”

“…Therefore, the major motivation for this work is to provide a better description and increased understanding about the potential effect of grain boundary plane distribution (GBPD) on magnetic properties. Recently, we have reported the orientation texture of boundary planes in hexagonal RCo 5 permanent magnets (with relatively weak orientation texture of crystals), [3][4][5][6] and we now report new computational developments in this inter-disciplinary work.…”

Effect of Deformation Temperature on Crystal Texture Formation in Hot Deformed Nanocrystalline SmCo5Permanent Magnets

“…Yue et al [7] reported that significantly improved texture can be obtained in nanocrystalline SmCo 5 alloys subjected to die upsetting at a very high degree of deformation (more than 85% height reduction). However, the mechanism of plastic deformation and texture formation during the hot deformation process is not yet clear [8,9]. In this paper, the orientation texture of grains and their boundary planes in nanocrystalline SmCo 5 anisotropic magnets are characterized using electron backscattered diffraction (EBSD).…”