The interrelated effect of activation energy and grain boundary energy on grain growth in nanocrystalline materials

被引：4
|
作者：
Chen, Z. [1 ,2 ]
Liu, F. [1 ]
Yang, X. Q. [3 ]
Chen, Y. Z. [1 ]
Yang, C. I. [1 ]
Yang, G. C. [1 ]
Zhou, Y. H. [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[2] China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou, Jiangsu, Peoples R China
[3] China Univ Min & Technol, Sch Chem Engn & Technol, Xuzhou, Jiangsu, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2013年 / 104卷 / 09期
关键词：
Grain growth; Grain boundary energy; Activation energy; Solute segregation; SIZE-DEPENDENT SOLUTE; THERMOKINETIC DESCRIPTION; THERMAL-STABILITY; IMPURITY-DRAG; FE-CU; ALLOYS; MOTION; STABILIZATION; EVOLUTION; KINETICS;
D O I：
10.3139/146.110931
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The interrelated effect of activation energy and grain boundary energy on grain growth and thermal stabilization in nanocrystalline materials was investigated. Departing from Borisov's equation and Kirchheim's grain boundary energy model, an activation energy model was derived incorporating solute segregation and grain growth. An integrated thermokinetic model for nanoscale grain growth was then developed by incorporating the coupled effects of activation energy and grain boundary energy. By application of the model to nanoscale grain growth of dense nanocrystalline gadolinia-doped ceria, a good agreement between the model predictions and the experimental results was obtained. It is shown that the interrelated effect of increased activation energy and decreased grain boundary energy induced thermal stability in the nanocrystalline materials.
引用
收藏
页码：817 / 822
页数：6
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