Studies on the crystallization kinetics of Cu-reinforced partially crystalline Cu47Ti33Zr11Ni8Si1 metallic glass composite

被引：10

作者：

Venkataraman, S.

Eckert, J.

Schultz, L.

Sordelet, D. J.

机构：

[1] Tech Univ Darmstadt, FB Mat & Geowissensch 2, FG Phys Metallkunde, D-64287 Darmstadt, Germany

[2] IFW Dresden, D-01171 Dresden, Germany

[3] US DOE, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 434卷

关键词：

metallic glasses; powder metallurgy; phase transition; kinetics; thermal analysis;

D O I：

10.1016/j.jallcom.2006.08.140

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：

The crystallization kinetics of partially crystalline Cu47Ti33Zr11Ni8Si1 gas atomized powder (GAP) and composites was studied by differential scanning calorimetry. The activation energy for crystallization as determined by the Kissinger equation is nearly equal for the particle-free powder (3.43 +/- 0.40 eV) and the composite (3.11 +/- 0.22 eV). The activation energy of crystallization derived from isothermal annealing experiments is nearly similar for the GAP (4.53 +/- 0.40 eV) and the composite (4.25 +/- 0.40 eV). The values of the Avrami exponent suggest that the crystallization is diffusion controlled. The local Avrami exponent suggests that surface nucleation is active in GAP but bulk crystallization dominates in milled composite powder. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：203 / 206

页数：4

共 15 条

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