Simulation of migration and coalescence of helium bubbles in nickel

被引：20

作者：

Zhang, Wei ^{[1
,2
]}

Han, Han ^{[1
]}

Dai, Jianxing ^{[1
]}

Ren, Cuilan ^{[1
,2
]}

Wang, Chengbin ^{[1
,2
]}

Yan, Long ^{[1
]}

Huang, Hefei ^{[1
]}

Zhu, Zhiyuan ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[2] Chinese Acad Sci, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China

来源：

JOURNAL OF NUCLEAR MATERIALS | 2019年 / 518卷

基金：

中国国家自然科学基金;

关键词：

MOLECULAR-DYNAMICS; MECHANISM; ENERGY; DIFFUSION; GROWTH; COPPER; NI;

D O I：

10.1016/j.jnucmat.2019.02.023

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanism of migration and coalescence of nanoscale helium bubbles was studied using molecular dynamics. Small helium bubbles in nickel were observed to migrate in a random-walk style at temperatures higher than 0.7 T-m (melting point). Coalescence occurred when two helium bubbles approached each other, leading to the formation of a large bubble. The motion of the helium bubbles in nickel proceeds by displacement of nickel atoms on the surface, which causes the rearrangement of other nickel atoms, resulting surface diffusion. These findings indicate that migration and coalescence may be the possible growth mechanism for small helium bubbles in nickel at high temperature. (C) 2019 Published by Elsevier B.V.

引用

页码：48 / 53

页数：6

共 32 条

[1] HELIUM BUBBLE FORMATION AND MIGRATION IN NIOBIUM [J].

AITKEN, D ;

GOODHEW, PJ ;

WALDRON, MB .

NATURE-PHYSICAL SCIENCE, 1973, 244 (131) :15-16

[2] AB-INITIO CALCULATIONS FOR HELIUM - A STANDARD FOR TRANSPORT PROPERTY MEASUREMENTS [J].

AZIZ, RA ;

JANZEN, AR ;

MOLDOVER, MR .

PHYSICAL REVIEW LETTERS, 1995, 74 (09) :1586-1589

[3] First-principles nickel database: Energetics of impurities and defects [J].

Connetable, Damien ;

Andrieu, Eric ;

Monceau, Daniel .

COMPUTATIONAL MATERIALS SCIENCE, 2015, 101 :77-87

[4] Molecular dynamics study of helium bubble pressure in tungsten [J].

Cui, Jiechao ;

Li, Min ;

Wang, Jun ;

Hou, Qing .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2015, 352 :104-106

[5]

Donnelly S. E., 1985, Radiation Effects, V90, P1, DOI 10.1080/00337578508222514

[6] Coalescence mechanism of helium bubble during tensile deformation revealed by in situ small-angle X-ray scattering [J].

Gao, Jie ;

Huang, Hefei ;

Liu, Jizhao ;

Zeng, Jianrong ;

Xie, Ruobing ;

Li, Yan .

SCRIPTA MATERIALIA, 2019, 158 :121-125

[7] A special coarsening mechanism for intergranular helium bubbles upon heating: A combined experimental and numerical study [J].

Gao, Jie ;

Huang, Hefei ;

Liu, Xiang ;

Wang, Chengbin ;

Stubbins, James F. ;

Li, Yan .

SCRIPTA MATERIALIA, 2018, 147 :93-97

[8] Evolution Law of Helium Bubbles in Hastelloy N Alloy on Post-Irradiation Annealing Conditions [J].

Gao, Jie ;

Bao, Liangman ;

Huang, Hefei ;

Li, Yan ;

Zeng, Jianrong ;

Liu, Zhe ;

Liu, Renduo ;

Shi, Liqun .

MATERIALS, 2016, 9 (10)

[9] Atomistic simulation of the trapping capability of He- vacancy defects at Ni Σ3(1(1)over-bar2)[110] grain boundary [J].

Gong, Hengfeng ;

Wang, Chengbin ;

Zhang, Wei ;

Huai, Ping ;

Lu, Wei ;

Zhu, Zhiyuan .

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, 2016, 24 (08)

[10] The energy and stability of helium-related cluster in nickel: A study of molecular dynamics simulation [J].

Gong, Hengfeng ;

Wang, Chengbin ;

Zhang, Wei ;

Xu, Jian ;

Huai, Ping ;

Deng, Huiqiu ;

Hu, Wangyu .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2016, 368 :75-80

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