On the Anisotropies of the Crystal Boundary Energy in Al and Zn and of the Crystal Boundary Diffusion in Zn

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  • AlおよびZnにおける結晶粒界エネルギの異方性ならびにZnにおける粒界拡散の異方性について
  • Al オヨビ Zn ニ オケル ケッショウ リュウカイ エネルギ ノ イホウセイ ナラビニ Zn ニ オケル リュウカイ カクサン ノ イホウセイ ニ ツイテ

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The anisotropies of the boundary energy and of the crystal boundary diffusion were studied employing tricrystal samples of Al and Zn. The obtained results may be summarized as follows: (1) The boundary energy (relative value) depends on the difference in orientation angle between the two crystals adjacent to the boundary and the maximum value is observed at the orientation angle difference of 28° for Al or 22° for Zn. (2) Read-Schockley’s theoretical relation between the boundary energy and the orientation angle difference agrees well with the experimental results, particularly well for the angle difference below 17∼18°. (3) The penetration depth of 65Zn in the boundary along the ⟨0001⟩ direction in Zn tricrystals reaches a maximum at about 30° orientation angle difference.

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