Roughening and strain-field evolution at a coherent grain boundary in α-Al₂O₃Roughening and strain-field evolution at a grain boundary in alpha-Al2O3
- Other Titles
- Roughening and strain-field evolution at a grain boundary in alpha-Al2O3
- Authors
- Lee, Sung Bo; Lee, Seung Yong; Yoo, Seung Jo; Kim, Yoonkoo; Kim, Jin-Gyu; Kim, Miyoung; Han, Heung Nam
- Issue Date
- Nov-2018
- Publisher
- AMER PHYSICAL SOC
- Citation
- Physical Review Materials, v.2, no.11
- Indexed
- SCIE
SCOPUS
- Journal Title
- Physical Review Materials
- Volume
- 2
- Number
- 11
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/15914
- DOI
- 10.1103/PhysRevMaterials.2.113405
- ISSN
- 2475-9953
- Abstract
- Using a combination of high-resolution transmission electron microscopy (HRTEM), geometric phase analysis of HRTEM images, and scanning TEM, we study the structural transition and strain-field evolution at the grain boundary in an α-Al₂O₃ bicrystal with a misorientation relationship of [0001]/30-. The specimens are annealed at 300, 500, and 700 °C in the TEM. The grain boundaries in the specimens before annealing and annealed at 300 °C are observed to be faceted, but the grain boundaries in those annealed at 500 and 700 °C become defaceted, exhibiting meandering morphology. Interestingly, for the as-received specimen and that annealed at 300 °C, there occurs a periodic strain fluctuation along the grain boundary. However, such a periodic fluctuation along the grain boundary is not observed in the specimens annealed at 500 and 700 °C. These results suggest an unexplored possibility that the roughening transition of a grain boundary is enhanced by strain relaxation occurring at the grain boundary.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 신소재공학부 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/15914)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.