Stress effects on the kinetics of nanoscale diffusion processes

SCRIPTA MATERIALIA

卷:64

Article

Erdelyi, Z.¹  Parditka, B.¹  Beke, D. L.¹ 

[1] Univ Debrecen, Dept Solid State Phys, H-4010 Debrecen, Hungary

关键词: Diffusion-induced stress;    Diffusion kinetics;    Stress relaxation;    Nernst-Planck regime;   

DOI  :  10.1016/j.scriptamat.2011.01.040

来源: Elsevier

【 摘 要 】

Schmitz et al. [Acta Materialia 57 (2009) 2673] showed experimentally that stress effects significantly influence the intermixing rate but surprisingly the parabolic growth rate is preserved. The influence on the intermixing rate was interpreted as a switching between the Darken and Nernst-Planck regimes caused by the diffusion-induced stress. We analyse theoretically how the stress field shifts the system from the Darken to the Nernst-Planck regime, why stress relaxation is not observed even though expectedand why the diffusion kinetics is not influenced by the developing stress field. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free