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Journal of the Korean Ceramic Society 1995;32(10): 1117. |
| 알루미나 쌍결정에서 조성변화에 의한 Zigzag Migration |
| 백용균, 강석중 |
| 한국과학기술원 재료공학과 |
| Chemically Induced Zigzag Migration in Alumina Bicrystals |
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| ABSTRACT |
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The effect of grain boundary structure on zigzag migrtion has been studied. Five kinds of a(2110)-m(1010) diffusion couples with different twist angles by 30$^{circ}$from a [0001] common direction of each plane were prepared. When chromia (Cr2O3) was added to the diffusion couples by a vapor phase, zigzag migration of the grain boundary occurred. The fraction of zigzag migration did not essentially vary with the twist angle, but the magnitude and migration distance of individual migrating segment varied. The variation of CIGM morphology thus appears to result from the change in grain boundary mobility due to microscopic deviation of grain boundary structure out of a macroscopic grain boundary orientation. |
| Key words:
Alumina, Chromia, Grain-boundary migration, Zigzag migration, Twist boundary |
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