Time-temperature superposition of structural relaxation in a viscous metallic liquid

被引：87
|
作者：
Meyer, A [1 ]
Busch, R
Schober, H
机构：
[1] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA
[2] Univ Maryland, Dept Mat & Nucl Engn, College Pk, MD 20742 USA
[3] CALTECH, WM Keck Labs Engn Mat, Pasadena, CA 91125 USA
[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
[5] Tech Univ Munich, Dept Phys, D-85747 Garching, Germany
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 24期
关键词：
D O I：
10.1103/PhysRevLett.83.5027
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Bulk metallic glass-forming Pd40Ni10Cu30P20 has been investigated in its equilibrium liquid by quasielastic neutron scattering. The quasielastic signal exhibits a structural relaxation as known from nonmetallic viscous liquids. Even well above the melting point, the structural relaxation is nonexponential and obeys a universal time-temperature superposition. From the mean relaxation times average diffusivities have been determined, resulting in values on a 10(-10) m(2) s(-1) scale, 3 orders of magnitude slower than in simple metallic liquids.
引用
收藏
页码：5027 / 5029
页数：3
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