SIMULATIONS OF COLLISION CASCADES IN Cu-Nb LAYERED COMPOSITES USING AN EAM INTERATOMIC POTENTIAL

被引：81

作者：

Demkowicz, M. J. ^{[1
,2
]}

Hoagland, R. G. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, MST Struct Property Relat Grp 8, Los Alamos, NM 87545 USA

[2] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

INTERNATIONAL JOURNAL OF APPLIED MECHANICS | 2009年 / 1卷 / 03期

关键词：

Composites; radiation; molecular dynamics; EMBEDDED-ATOM-METHOD; BOND-ORDER POTENTIALS; MOLECULAR-DYNAMICS; FCC METALS; NANOLAYERED COMPOSITES; CU/NB MULTILAYERS; TERSOFF-BRENNER; COPPER; TEMPERATURE; IMPURITIES;

D O I：

10.1142/S1758825109000216

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The embedded atom method (EAM) is used to construct an interatomic potential for modelling interfaces in Cu-Nb nanocomposites. Implementation of the Ziegler-Biersack-Littmark (ZBL) model for short-range interatomic interactions enables studies of response to ion bombardment. Collision cascades are modelled in fcc Cu, bcc Nb, and in Cu-Nb layered composites in the experimentally-observed Kurdjumov-Sachs (KS) orientation relation. The interfaces in these composites reduce the number of vacancies and interstitials created per keV of the primary knock-on atom (PKA) by 50-70% compared to fcc Cu or bcc Nb.

引用

页码：421 / 442

页数：22

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