On the stagnation of grain growth in nanocrystalline materials

被引：32
|
作者：
Li, Junjie [1 ]
Wang, Jincheng [1 ]
Yang, Gencang [1 ]
机构：
[1] NW Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
SCRIPTA MATERIALIA | 2009年 / 60卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Grain growth; Segregation; Grain boundary energy; Nanocrystalline materials; SIZE-DEPENDENT SOLUTE; BOUNDARY MOTION; THERMODYNAMIC STABILIZATION; THERMAL-STABILITY; ALLOYS; DRAG; SEGREGATION; KINETICS; METALS;
D O I：
10.1016/j.scriptamat.2009.02.015
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The stagnation of grain growth with solute segregation in nanocrystalline materials is often analyzed by using two kinetic models [J.E. Burke, Trans. Metall. Soc. AIME 180 (1949) 73; A. Michels, C.E. Krill, H. Ehrhardt, R. Birringer, D.T. Wu, Acta Mater. 47 (1999) 2143], in which it is supposed that solute drag stops grain growth. However, we show that the drag force in these kinetic models is not equivalent to the solute drag force, but to the reduced driving force due to the decrease in grain boundary energy. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：945 / 948
页数：4
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