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

Abstract

The electron backscattered diffraction technique was used to identify the orientation textures of both grains and boundary planes in a hot deformed SmCo₅ permanent magnet. The results show that the orientations of SmCo₅ grains are strongly textured and the {0001} orientations are remarkably preferred. Moreover, grain boundary planes are also textured. Three symmetry equivalents of Σ13a boundaries, namely the 27.796°/[0001] boundary, the 32.204°/[0001] boundary and the 92.204°/[0001] boundary, are favored, and the occurring frequency of Σ13a boundaries is 5 times higher than that of the random boundaries. Potential effects of the orientation textures of grains and boundary planes on the magnets are also proposed.