The role of thermal spike compactness in radiation-induced disordering and Frenkel pair production in Ni3Al

被引：15

作者：

Skirlo, S. A. ^{[1
]}

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

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

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

来源：

SCRIPTA MATERIALIA | 2012年 / 67卷 / 7-8期

关键词：

Molecular dynamics (MD); Ordering; Lattice defects; Radiation; DISPLACEMENT CASCADES; DEFECT PRODUCTION; COMPUTER-SIMULATION; MOLECULAR-DYNAMICS; GRAIN-BOUNDARIES; DAMAGE; METALS; IRRADIATION; FEATURES; COPPER;

D O I：

10.1016/j.scriptamat.2012.06.029

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We show that the shape of the kinetic energy distribution in radiation-induced thermal spikes may be described using a dimensionless number, proportional to (volume)(2/3)/(surface area), known as compactness. The disorder produced in thermal spikes in Ni3Al increases with compactness because the thermal spike cooling rate, which determines the time available for thermal disordering, decreases with compactness. On the other hand, Frenkel pair production is inversely correlated to compactness because longer thermal spike lifetimes enhance vacancy-interstitial recombination. (c) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：724 / 727

页数：4

共 17 条

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Lee, Tongsik
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JOURNAL OF MATERIALS RESEARCH, 2015, 30 (09) : 1456 - 1463
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Michael J. Demkowicz
Journal of Materials Research, 2015, 30 : 1456 - 1463
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