Stacking-fault formation in [001] small-angle symmetric tilt grain boundaries in cubic zirconia bicrystals |
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| Authors: | N. Shibata N. Morishige T. Yamamoto Y. Ikuhara T. Sakuma |
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| Affiliation: | 1. Department of Applied Science for Electronics and Materials , Interdisciplinary Graduate School of Engineering Sciences, Kyushu University , Kasuga, Fukuoka 816-8580, Japan;2. Art, Science and Technology Center for Cooperative Research , Kyushu University , Kasuga, Fukuoka 816-8580, Japan;3. Department of Materials Science and Engineering and Handai Frontier Research Center , Graduate School of Engineering, Osaka University , Suita, Osaka 565-0871, Japan |
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| Abstract: | Small-angle symmetric [001] tilt grain boundaries in cubic zirconia bicrystals with misorientation angles 2θ =1.0° and 2θ =5.0° have been fabricated by diffusion bonding. High-resolution electron microscopy observations revealed that the 1.0° boundary consists of a periodic array of mixed dislocations with Burgers vector b =( a /2)[101] or b = ( a /2)[101], while the 5.0° boundary consists of a periodic array of edge dislocations with Burgers vector b = ( a /2)[100], associated with stacking faults at alternate intervals. This suggests that there is a critical angle for structural transitions in the series of the [001] small-angle tilt grain boundaries. |
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