Dislocation Structure of 10° Low-Angle Tilt Grain Boundary in α-Al2O3


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Dislocation structure of 10º low-angle tilt grain boundary in α-Al2O3 has been observed by high-resolution electron microscopy (HRTEM). It was found that perfect <1120> edge dislocations, which are introduced to compensate the misorientation, dissociated into two mixed partial dislocations with {1120} stacking-fault in between. The distances between the two partials were estimated by the force balances between repulsive forces of periodical dislocations and attractive forces from stacking-fault. The stacking-fault energy for 10o low-angle tilt grain boundary was estimated to be much higher than the previously reported value.



Materials Science Forum (Volumes 558-559)

Edited by:

S.-J.L. Kang, M.Y. Huh, N.M. Hwang, H. Homma, K. Ushioda and Y. Ikuhara




E. Tochigi et al., "Dislocation Structure of 10° Low-Angle Tilt Grain Boundary in α-Al2O3", Materials Science Forum, Vols. 558-559, pp. 979-982, 2007

Online since:

October 2007




[1] H. Yoshida, K. Okada, Y. Ikuhara, and T. Sakuma, Philos. Mag. Lett., 76, 1 (1997).

[2] H. Yoshida, Y. Ikuhara, and T. Sakuma, Acta. Mater., 50 (2002).

[3] F. C. Frank, Philos. Mag. 7th Ser., 42, 331 (1951).

[4] K. P. D. Lagerlöf, T.E. Mitchell, H. Heuer, J. P. Rivière, J. Cadoz, J. Castaing, and D. S. Phillips, Acta Matell., 32, 1 (1984).

[5] Y. Ikuhara, H. Nishimura, A. Nakamura, K. Matsunaga, and T. Yamamoto, J. Am. Ceram. Soc., 86, 4 (2003).

[6] Y. Ikuhara, T. Watanabe, T. Saito, H. Yoshida, and T. Sakuma, IIB98 Mater. Sci. Forum, 294-2 (1999).

[7] H. Nishimura, K. Matsunaga, T. Saito, T. Yamamoto, and Y. Ikuhara, J. Am. Ceram. Soc., 86, 4 (2003).

[8] M. L. Kronberg, Acta Matell., 5, 507 (1957).

[9] J.P. Hirth and J. Lothe, Theory of dislocations, 2 nd Ed., Willy, New York, (1982).

[10] J. H. Gieske and G. R. Barsch, Phys. Stat. Sol., 29, 121 (1968).

[11] D. H. Chung and G. Simmons, J. Appl. Phys., 39, 11 (1968).

[12] A. Nakamura, T. Yamamoto, and Y. Ikuhara, Acta Mater., 50 (2002).

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