Grain size-dependent diffusion activation energy in nanomaterials

被引：130

作者：

Jiang, Q ^{[1
]}

Zhang, SH ^{[1
]}

Li, JC ^{[1
]}

机构：

[1] Jilin Univ, Dept Mat Sci & Engn, Key Lab Automobile Mat, Minist Educ, Changchun 130025, Peoples R China

来源：

SOLID STATE COMMUNICATIONS | 2004年 / 130卷 / 09期

基金：

中国国家自然科学基金;

关键词：

nanostructures; diffusion; activation energy;

D O I：

10.1016/j.ssc.2004.03.033

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report a unified model, free of any adjustable parameter, for size-dependence of intrinsic diffusion activation energy of elements in crystals. It is found that as the size of the nanocrystals decreases, the diffusion activation energy of atoms decreases and the corresponding diffusion coefficient strongly increases due to the Arrhenius relationship between them, which leads to evident diffusion at the room temperature. The model prediction is in agreement with the experimental diffusion results of N into bee Fe and Ag into Au nanoparticles. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：581 / 584

页数：4

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