Abstract
The electron backscatter diffraction approach and five parameter analysis method are used to investigate the orientation textures of boundary planes in a (La0.67Nd0.33)B6 polycrystalline bulk prepared by spark plasma sintering. While the entire boundaries overall favour the {001} orientation, the orientation textures of various boundary planes are not homogeneous. If divided by the boundary type, the LaB6/LaB6 grain boundary planes favour the {001} orientation, the NdB6/NdB6 grain boundary plane orientation approaches the {011} position, and the LaB6/NdB6 phase boundary planes favour the {011} orientation. If divided by the misorientation angle, boundaries with a misorientation angle lower than 10° favour the {011} orientation and boundaries with a misorientation angle higher than 10° favour the {001} orientation. Possible origins of the anisotropic distribution of boundary planes are analyzed. The potential effects of anisotropy in boundary plane distributions on electron emissivity are also suggested.
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