In-situ neutron scattering study of crystallization in a Zr-based bulk metallic glass

被引：9
|
作者：
Ma, D. [1 ]
Stoica, A. D. [1 ]
Wang, X. -L. [1 ]
Lu, Z. P. [2 ]
Proffen, T. [3 ]
机构：
[1] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA
[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
[3] Los Alamos Natl Lab, Lujan Neutron Scattering Ctr, Los Alamos, NM 87545 USA
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2010年 / 99卷 / 03期
基金：
中国国家自然科学基金;
关键词：
ACTIVATION-ENERGIES; NUCLEATION;
D O I：
10.1007/s00339-010-5608-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Crystallization of a Zr-based bulk metallic glass (Zr50.4Cu40.6Al9) upon isothermal annealing has been investigated using in-situ neutron diffraction and the pair distribution function (PDF) method. By extracting the contribution of the crystalline phase from the total scattering, we are able to obtain the real-time structure factor and pair distribution function for the crystalline phase as well as its volume fraction. Our analysis shows that the crystallization follows the Johnson-Mehl-Avrami law with a time exponent of 4.0 +/- 0.2, indicating a three-dimensional nucleation and growth process. The analysis method established in the present study paves a new way for probing the kinetics of phase transformation for a broad range of non-crystalline materials including liquids and glasses.
引用
收藏
页码：537 / 542
页数：6
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