Correlating the supercooled liquid region width with the fragility parameter in bulk metallic glasses

被引：13
|
作者：
Hu, L. [1 ]
Ye, F. [1 ]
Liang, Y. F. [1 ]
Lin, J. P. [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 02期
关键词：
FORMING ABILITY CRITERION; MEDIUM-RANGE ORDER; VISCOUS-FLOW; TRANSITION; VISCOSITY; KINETICS; CRYSTALLIZATION; THERMODYNAMICS; EQUILIBRIUM; RELAXATION;
D O I：
10.1063/1.3675910
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A linear correlation of fragility parameter D* with supercooled liquid region width Delta T-x for Ca-based bulk metallic glasses (BMGs) was revealed. This relationship is found in La- and Zr-based BMGs as well and extended to several glass-forming systems. The origin of this phenomenon lies in the close relation between crystallization and temperature dependence of viscosity. This relationship can be formulated by Delta T-x(0.33) = 6.8 x 10(-3) x (D*)(T-g(0.33)) + 2(K), indicating that the unique variation of the viscosity with the temperature correlates with the location and width of the supercooled liquid region. Moreover, an approximation of fragility parameter D* for BMGs can be evaluated by the formula. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3675910]
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页数：3
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