In situ atomic-scale observation of dislocation behaviors in twin-structured Pt nanocrystals

被引：5

作者：

Guo, YiZhong ^{[1
]}

Sun, Tao ^{[1
]}

Fu, LiBo ^{[1
]}

Hao, LongHu ^{[1
]}

Huang, Ming ^{[1
]}

Wei, RuJian ^{[1
]}

Luo, JunFeng ^{[2
]}

He, Xin ^{[2
]}

Wang, XingQuan ^{[2
]}

Xiong, XiaoDong ^{[2
]}

Wang, LiHua ^{[1
]}

Han, XiaoDong ^{[1
]}

机构：

[1] Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing Key Lab Microstruct & Property Adv Mat, Beijing, Peoples R China

[2] Grikin Adv Mat CO LTD, Beijing 102200, Peoples R China

来源：

SCIENCE CHINA-TECHNOLOGICAL SCIENCES | 2021年 / 64卷 / 03期

基金：

中国国家自然科学基金; 北京市自然科学基金; 国家重点研发计划;

关键词：

deformation mechanism; repulsive force; twin boundary; dislocations; in situ; DEFORMATION MECHANISMS; ULTRAHIGH STRENGTH; MAXIMUM STRENGTH; BOUNDARIES; PLASTICITY; NUCLEATION; DUCTILITY; AL;

D O I：

10.1007/s11431-020-1542-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The deformation mechanisms of twin-structured metallic materials have attracted great interest. Though previous theoretical predictions have suggested that the repulsive force of the twin boundary (TB) can significantly affect the deformation of twin-structured metals, it remains unclear whether this prediction applies to experimental conditions. In this paper, the atomic-scaled deformation process of twin-structured Pt nanocrystals was in situ observed using our home-made device in a high-resolution transmission electron microscope. We have shown that the plastic deformation of the twin-structured Pt nanocrystals was governed by full dislocation generation as well as Lomer dislocation (LD) lock formation and destruction. After LD locks were destructed, these full dislocations tended to move towards the surface of the nanocrystals. The findings revealed that due to the ultra-high repulsive force of TB on dislocation, there was no dislocation-TB reaction during the deformation. These findings can enrich our understanding of the dislocation behaviors of twin-structured nanocrystals.

引用

页码：599 / 604

页数：6

共 50 条

[41] Atomic-scale simulation of screw dislocation/coherent twin boundary interaction in Al, Au, Cu and Ni
Chassagne, M.
Legros, M.
Rodney, D.
ACTA MATERIALIA, 2011, 59 (04) : 1456 - 1463
[42] In situ atomic observation of transformation twinning in nanocrystals
Zhang, Qiubo
Dong, Hui
Ren, Amy
Nie, Yifan
Zheng, Haimei
NANO TODAY, 2025, 60
[43] Atomic-scale modelling of dislocation behaviour under stress
Bacon, DJ
Osetsky, YN
IUTAM SYMPOSIUM ON MULTISCALE MODELING AND CHARACTERIZATION OF ELASTIC-INELASTIC BEHAVIOR OF ENGINEERING MATERIALS, PROCEEDINGS, 2004, 114 : 59 - 66
[44] Atomic-scale structure of nanocrystals by the atomic pair distribution function technique
Petkov, V
NSTI NANOTECH 2004, VOL 3, TECHNICAL PROCEEDINGS, 2004, : 410 - 413
[45] Atomic-scale structure of nanocrystals by the atomic pair distribution function technique
Petkov, V
MOLECULAR SIMULATION, 2005, 31 (2-3) : 101 - 105
[46] In situ atomic-scale observation of AuCu alloy nanowire with superplasticity and high strength at room temperature
Fu, L.
Yang, C.
Wei, R.
Pei, X.
Teng, J.
Kong, D.
Lu, Y.
Guo, Y.
Liu, T.
Hu, Y.
Yin, B.
Zhang, Z.
Li, A.
Wang, L.
Han, X.
MATERIALS TODAY NANO, 2021, 15
[47] In situ atomic-scale observation of AuCu alloy nanowire with superplasticity and high strength at room temperature
Fu, L.
Yang, C.
Wei, R.
Pei, X.
Teng, J.
Kong, D.
Lu, Y.
Guo, Y.
Liu, T.
Hu, Y.
Yin, B.
Zhang, Z.
Li, A.
Wang, L.
Han, X.
Materials Today Nano, 2021, 15
[48] In situ atomic-scale observation of melting point suppression in nanometer-sized gold particles
Lee, Junggoo
Lee, Joonho
Tanaka, Toshihiro
Mori, Hirotaro
NANOTECHNOLOGY, 2009, 20 (47)
[49] Atomic-Scale Observation of Irradiation-Induced Surface Oxidation by In Situ Transmission Electron Microscopy
Huang, Xing
Jones, Travis
Fan, Hua
Willinger, Marc-Georg
ADVANCED MATERIALS INTERFACES, 2016, 3 (22):
[50] In Situ Atomic-Scale Observation of Droplet Coalescence Driven Nucleation and Growth at Liquid/Solid Interfaces
Li, Junjie
Wang, Zhongchang
Leonard Deepak, Francis
ACS NANO, 2017, 11 (06) : 5590 - 5597

← 1 2 3 4 5 →