Nucleation rate and nanocrystallization of Co60-(Fe, Mn)18-Nb6-B16 amorphous alloys in the frame of instantaneous growth approximation

被引：7

作者：

Blazquez, J. S. ^{[1
]}

Millan, M. ^{[1
]}

Conde, C. F. ^{[1
]}

Conde, A. ^{[1
]}

机构：

[1] Univ Seville, CSIC, ICMSE, Dept Fis Mat Condensada, E-41080 Seville, Spain

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 505卷 / 01期

关键词：

Amorphous and nanocrystalline materials; Nanocrystallization kinetics; MAGNETIC-PROPERTIES; FE; KINETICS; CO; CRYSTALLIZATION;

D O I：

10.1016/j.jallcom.2010.06.045

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Instantaneous growth approximation is based on the fact that the time required by a new nucleus to reach its saturation size is negligible in comparison with the time required for the whole crystallization process. This approximation has been applied to analyze the kinetics of the nanocrystallization process of Co60Fe18-xMnxNb6B16 (x = 0 and 4) alloys. Direct application of JMAK theory leads to divergences at very high transformed fractions. Although this divergence could be due to some artifacts, it can also be solved after a reinterpretation of the geometrical impingement effect on nanocrystalline systems. A modified Arrhenius relationship can be used for a general description of the double dependency of nucleation rate on the transformed fraction (only through the local activation energy) and the temperature. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：91 / 95

页数：5

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