Atomic-scale mechanism of rhombohedral twinning in sapphire

被引：0

作者：

Tochigi, Eita ^{[1
,2
]}

Miao, Bin ^{[1
]}

Nakamura, Atsutomo ^{[2
,3
]}

Shibata, Naoya ^{[1
,4
]}

Ikuhara, Yuichi ^{[1
,4
,5
]}

机构：

[1] Institute of Engineering Innovation, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku,Tokyo,113-8656, Japan

[2] PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi,Saitama,332-0012, Japan

[3] Department of Mechanical Science and Bioengineering, Osaka University, 1-3 Machikaneyama-chou, Toyonaka,Osaka,560-8531, Japan

[4] Nanostructures Research Laboratory, Japan Fine Ceramics Center, 2-4-1 Mutsuno, Atsuta-ku, Nagoya,Aichi,456-8587, Japan

[5] Center for Elements Strategy Initiative for Structure Materials, Kyoto University, Yoshidahonmachi, Sakyo-ku,Kyoto,606-8501, Japan

来源：

Acta Materialia | 2021年 / 216卷

基金：

日本学术振兴会;

关键词：

Atomic motion - Atomic-scale mechanisms - Collective properties - Cooperative motion - Deformation twinning - Ionic compounds - Rhombohedral twinning - Step structure;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Deformation twinning is a fundamental plastic deformation mode in crystals. Upon twinning, individual atoms must move in different directions to satisfy the twin symmetry, which is called atomic shuffling. However, actual atomic motions during shuffling are still unknown, especially for ionic compounds. Here, we report the dynamic twinning behavior dominated by the atomic shuffling in sapphire (α-Al2O3). The propagation and annihilation of twins are revealed to be mediated by migration of step structures on the matrix/twin interfaces. The step migration is driven by cooperative motions of a group of five atoms with relatively few recombination of Al–O bonds. Our findings imply that the atomic shuffling associated with twinning is determined by a collective property of a group of several atoms. © 2021

引用

共 50 条

[31] Atomic-scale material removal and deformation mechanism in nanoscratching GaN
Zhao, Jun
Li, Wuqian
Chen, Shiwei
Lan, YeShen
Wiercigroch, Marian
Wang, Zixuan
Zhao, Ji
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 2025, 285
[32] Atomic-scale mechanism for pressure-induced amorphization of β-eucryptite
Narayanan, Badri
Reimanis, Ivar E.
Ciobanu, Cristian V.
JOURNAL OF APPLIED PHYSICS, 2013, 114 (08)
[33] Effect of a micro-scale dislocation pileup on the atomic-scale multi-variant phase transformation and twinning
Peng, Yipeng
Ji, Rigelesaiyin
Phan, Thanh
Capolungo, Laurent
Levitas, Valery I.
Xiong, Liming
COMPUTATIONAL MATERIALS SCIENCE, 2023, 230
[34] Considerations of the double-cross-slip mechanism for basal and rhombohedral twinning in sapphire (α-Al2O3)
He, A
Lagerlöf, KPD
Castaing, J
Heuer, AH
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 2002, 82 (15): : 2855 - 2867
[35] ATOMIC MECHANISM OF CALCITE TWINNING
KHROMOVA, NN
KRISTALLOGRAFIYA, 1990, 35 (01): : 114 - 120
[36] Study on hygroscopic mechanism and atomic-scale hygroscopic pathways of polyurethane foams
Xu, Yingfeng
Tian, Chunrong
Bao, Luyao
Wei, Kaijie
Liu, Yanhua
Yu, Bo
Zhou, Feng
JOURNAL OF APPLIED POLYMER SCIENCE, 2023, 140 (19)
[37] Atomic-scale modeling of nanoconstrictions
Mukherjee, S
Litvinov, D
Khizroev, S
IEEE TRANSACTIONS ON MAGNETICS, 2004, 40 (04) : 2143 - 2145
[38] Copper atomic-scale transistors
Xie, Fangqing
Kavalenka, Maryna N.
Roeger, Moritz
Albrecht, Daniel
Hoelscher, Hendrik
Leuthold, Jurgen
Schimmel, Thomas
BEILSTEIN JOURNAL OF NANOTECHNOLOGY, 2017, 8 : 530 - 538
[39] Uniform atomic-scale structures
不详
AMERICAN CERAMIC SOCIETY BULLETIN, 2004, 83 (05): : 6 - 6
[40] Atomic-scale stick slip
Bennewitz, R
Meyer, E
Bammerlin, M
Gyalog, T
Gnecco, E
FUNDAMENTALS OF TRIBOLOGY AND BRIDGING THE GAP BETWEEN THE MACRO-AND MICRO/NANOSCALES, 2001, 10 : 53 - 66

← 1 2 3 4 5 →