Kinetic analysis of spinodal decomposition process in Fe-Cr alloys by small angle neutron scattering

被引：55
|
作者：
Ujihara, T [1 ]
Osamura, K [1 ]
机构：
[1] Kyoto Univ, Fac Engn, Dept Mat Sci & Engn, Kyoto 6068501, Japan
来源：
ACTA MATERIALIA | 2000年 / 48卷 / 07期
基金：
日本学术振兴会;
关键词：
neutron scattering; alloys (iron); dynamic phenomena; phase transformations (spinodal decomposition);
D O I：
10.1016/S1359-6454(99)00441-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The rate of spinodal decomposition depends on the spatial composition distribution. Zn order to estimate the time dependence of its rate experimentally, the structure change was investigated in Fe-30 at.% Cr and Fe-50 at.% Cr alloys aged at 748, 773, 798, and 823 K via small angle neutron scattering and a kinetic analysis of experimental data was carried out by using the Langer-Bar-on-Milier (LBM) theory. Their theory contains a rate term of a physical meaning similar to the diffusion coefficient. As a result, it becomes clear that the rate term corresponding to the diffusion coefficient decreases as decomposition advances and this fact can he explained by the modified LBM theory considering the composition-dependent mobility. (C) 2000 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1629 / 1637
页数：9
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