A rate theory study of helium bubble formation and retention in Cu-Nb nanocomposites

被引：34

作者：

Dunn, A. Y. ^{[1
]}

McPhie, M. G. ^{[1
]}

Capolungo, L. ^{[1
]}

Martinez, E. ^{[2
]}

Cherkaoui, M. ^{[1
]}

机构：

[1] CNRS, Georgia Tech, George W Woodruff Sch Mech Engn, Georgia Inst Technol,UMI 2958, F-57070 Metz, France

[2] Los Alamos Natl Lab, Los Alamos, NM USA

来源：

JOURNAL OF NUCLEAR MATERIALS | 2013年 / 435卷 / 1-3期

关键词：

EDGE DISLOCATIONS; GRAIN-BOUNDARIES; VACANCY CLUSTERS; HE; DIFFUSION; IRRADIATION; NUCLEATION; METALS; ENERGY; ACCUMULATION;

D O I：

10.1016/j.jnucmat.2012.12.041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A spatially dependent rate theory model for helium migration, clustering, and trapping on interfaces between Cu and Nb layers is introduced to predict the evolution of the concentrations of He clusters of various sizes during implantation and early annealing. Migration and binding energies of point defects and small clusters in bulk Cu and Nb are found using conjugate gradient minimization and the nudged elastic band method. This model is implemented in a three-dimensional framework and used to predict the relationship between helium bubble formation and the nano-composite microstructure, including interfacial free volume, grain size, and layer thickness. Interstitial and vacancy-like migration of helium is considered. The effects of changing layer thickness and interfacial misfit dislocation density on the threshold for helium bubble nucleation are found to match experiments. Accelerated helium release due to interfaces and grain boundaries is shown to occur only when diffusion rates on interfaces and grain boundaries are greatly increased relative to the bulk material. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：141 / 152

页数：12

共 50 条

[1]

ADAMS JB, 1988, J NUCL MATER, V158, P25, DOI 10.1016/0022-3115(88)90150-X

[2] Comparative study of radiation damage accumulation in Cu and Fe [J].

Caturla, MJ ;

Soneda, N ;

Alonso, E ;

Wirth, BD ;

de la Rubia, TD ;

Perlado, JM .

JOURNAL OF NUCLEAR MATERIALS, 2000, 276 (276) :13-21

[3] Gas bubbles evolution peculiarities in ferritic-martensitic and austenitic steels and alloys under helium-ion irradiation [J].

Chernov, II ;

Kalashnikov, AN ;

Kahn, BA ;

Binyukova, SY .

JOURNAL OF NUCLEAR MATERIALS, 2003, 323 (2-3) :341-345

[4] RESONANT MODEL POTENTIAL .2. TOTAL ENERGY - THEORY AND APPLICATION TO COPPER, SILVER, GOLD AND CALCIUM [J].

DAGENS, L .

JOURNAL OF PHYSICS F-METAL PHYSICS, 1977, 7 (07) :1167-1191

[5] Interface structure and radiation damage resistance in Cu-Nb multilayer nanocomposites [J].

Demkowicz, M. J. ;

Hoagland, R. G. ;

Hirth, J. P. .

PHYSICAL REVIEW LETTERS, 2008, 100 (13)

[6] Mechanisms of He escape during implantation in CuNb multilayer composites [J].

Demkowicz, M. J. ;

Wang, Y. Q. ;

Hoagland, R. G. ;

Anderoglu, O. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2007, 261 (1-2) :524-528

[7] The effect of excess atomic volume on He bubble formation at fcc-bcc interfaces [J].

Demkowicz, M. J. ;

Bhattacharyya, D. ;

Usov, I. ;

Wang, Y. Q. ;

Nastasi, M. ;

Misra, A. .

APPLIED PHYSICS LETTERS, 2010, 97 (16)

[8] SIMULATIONS OF COLLISION CASCADES IN Cu-Nb LAYERED COMPOSITES USING AN EAM INTERATOMIC POTENTIAL [J].

Demkowicz, M. J. ;

Hoagland, R. G. .

INTERNATIONAL JOURNAL OF APPLIED MECHANICS, 2009, 1 (03) :421-442

[9] The influence of Σ3 twin boundaries on the formation of radiation-induced defect clusters in nanotwinned Cu [J].

Demkowicz, Michael J. ;

Anderoglu, Osman ;

Zhang, Xinghang ;

Misra, Amit .

JOURNAL OF MATERIALS RESEARCH, 2011, 26 (14) :1666-1675

[10] GAS-DIFFUSION AND TEMPERATURE-DEPENDENCE OF BUBBLE NUCLEATION DURING IRRADIATION [J].

FOREMAN, AJE ;

SINGH, BN .

JOURNAL OF NUCLEAR MATERIALS, 1986, 141 :672-676

← 1 2 3 4 5 →