ON THE DIFFUSION ANISOTROPY OF POLYCRYSTALS

A model of diffusion anisotropy appearance in a textured polycrystalli ne aggregate under the grain boundary diffusion preponderance (the C t ype of kinetic) has been suggested. Although in the textured polycryst al there exists a distribution over 5 degrees of freedom describing th e grain boundaries macroscopically, it is the misorientation distribut ion that has been shown to may give rise to the diffusion anisotropy. Presence of small-angle boundaries and a certain, sufficiently sharp t exture is the key moment at this.