Kinetics of isothermal structural relaxation in metallic glasses measured by real-time diffraction using synchrotron radiation

被引：6
|
作者：
Hajlaoui, K. [1 ,2 ]
Yousfi, M. A. [3 ]
Ouelhazi, I. [3 ]
Georgarakis, K. [1 ]
Tourki, Z. [3 ]
Vaughan, G. [4 ]
Yavari, A. R. [1 ]
机构：
[1] Inst Natl Polytech Grenoble, SIMaP LTPCM, F-38402 St Martin Dheres, France
[2] ENIM, LGM MA05, Monastir 5019, Tunisia
[3] Univ Tunis, ESSTT, LMMP LAB STI03, Tunis 1008, Tunisia
[4] ESRF, F-38402 Grenoble, France
来源：
PHILOSOPHICAL MAGAZINE LETTERS | 2011年 / 91卷 / 02期
关键词：
metallic glasses; structural relaxation; free volume; synchrotron radiation; X-ray diffraction; FREE-VOLUME KINETICS; THERMAL-EXPANSION; AMORPHOUS FE40NI40B20; BEND STRESSES; VISCOUS-FLOW; TRANSITION; VISCOSITY; ALLOYS; EQUILIBRIUM; ANNIHILATION;
D O I：
10.1080/09500839.2010.537701
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Quantitative measurements of the excess free volume in Pd40Cu30Ni10P20 and Cu55Zr30Ti10Pd5 metallic glasses during in situ isothermal annealing at various temperatures are used to identify physical parameters of structural relaxation in metallic glasses and to discuss proposed models describing this process. The free-volume model is found to provide a simple and predictive description for structural relaxation phenomena. We show that structural relaxation kinetics follows a second-order law in a satisfactory manner. The activation energy for relaxation is found to depend on annealing temperature and the extent of structural relaxation.
引用
收藏
页码：122 / 133
页数：12
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