TITLE

Liquid Al80Cu20: Atomic diffusion and viscosity

AUTHOR(S)
Brillo, J.; Chathoth, S. M.; Koza, M. M.; Meyer, A.
PUB. DATE
September 2008
SOURCE
Applied Physics Letters;9/22/2008, Vol. 93 Issue 12, p121905
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Properties of mass transport in liquid Al80Cu20 were measured over a broad temperature range of more than 500 K by means of oscillating cup viscometry and quasielastic neutron scattering. The shear viscosity and the coefficient of the Cu self-diffusion exhibit an Arrhenius-type temperature dependence. The activation energy for the viscous flow is 2.4 times smaller than that of the Cu self-diffusion. Below 1400 K, the Cu self-diffusion becomes increasingly smaller than expected from the viscosity data rescaled via the Stokes–Einstein relation.
ACCESSION #
34647460

 

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