Vacancy migration energy dependence on local chemical environment in Fe-Cr alloys: A Density Functional Theory study

被引：16

作者：

Costa, D. ^{[1
,2
]}

Adjanor, G. ^{[2
]}

Becquart, C. S. ^{[1
]}

Olsson, P. ^{[3
]}

Domain, C. ^{[1
,2
]}

机构：

[1] Univ Lille 1, Unite Mat & Transformat, CNRS UMR8207, F-59655 Villeneuve Dascq, France

[2] EDF R&D Dept MMC, F-77818 Les Renardieres, Moret Sur Loing, France

[3] KTH Royal Inst Technol, S-10691 Stockholm, Sweden

来源：

JOURNAL OF NUCLEAR MATERIALS | 2014年 / 452卷 / 1-3期

关键词：

SPINODAL DECOMPOSITION; AB-INITIO; COMPUTER-MODELS; ATOMIC-LEVEL; MONTE-CARLO; RADIATION-DAMAGE; SYSTEM; ACCURATE; BEHAVIOR; POINTS;

D O I：

10.1016/j.jnucmat.2014.05.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The first step towards the understanding and the modelling of the Fe-Cr alloy kinetic properties consists in estimating the migration energies related to the processes that drive the microstructure evolution. The vacancy's migration barrier is expected to depend on the vacancy-migrating atom pair atomic environment as pointed out by Nguyen-Manh et al. or Bonny et al. In this paper, we address the issue of the dependence on the vacancy's local atomic environment of both the vacancy migration energy and the configurational energy change Delta E that occurs when the vacancy jumps towards one of its nearest neighbour sites. A DFT approach is used to determine the ground state energy associated to a given configuration of the system. The results are interpreted in the light of the chromium-chromium and chromium-vacancy binding energies as well as the substitutional chromium atoms magnetic properties. (C) 2014 Elsevier B. V. All rights reserved.

引用

页码：425 / 433

页数：9

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