Self diffusion in liquid aluminium

被引：82

作者：

Kargl, F. ^{[1
]}

Weis, H. ^{[1
]}

Unruh, T.

Meyer, A. ^{[1
]}

机构：

[1] Deutsch Zentrum Luft & Raumfahrt DLR, Inst Mat Phys Weltraum, D-51170 Cologne, Germany

来源：

5TH EUROPEAN CONFERENCE ON NEUTRON SCATTERING | 2012年 / 340卷

关键词：

SCATTERING; DENSITY; METALS;

D O I：

10.1088/1742-6596/340/1/012077

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Here we report temperature dependent self-diffusion coefficients of liquid aluminium measured on absolute scale by using incoherent quasielastic neutron scattering at temperatures of 980K, 1020K, and 1060K. Aluminium self-diffusion coefficients follow an Arrhenius law with an activation energy of 280 +/- 70 meV. The Sutherland-Einstein equation relating viscosity to the diffusion coefficient well captures the temperature dependence and absolute values of the here reported aluminium self-diffusion coefficients using the covalent radius of aluminium. A comparison to published molecular dynamics simulation data helps to further narrow down the choice of the potential.

引用

页数：5

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