Diffusion of Cu in AlCu alloys of different composition by quasielastic neutron scattering

TitleDiffusion of Cu in AlCu alloys of different composition by quasielastic neutron scattering
Publication TypeJournal Article
Year of Publication2007
AuthorsDahlborg U, Besser M, Calvo-Dahlborg M, Janssen S, Juranyi F, Kramer MJ, Morris JR, Sordelet DJ
Journal TitleJournal of Non-Crystalline Solids
Volume353
Pages3295-3299
Date PublishedOct
Type of ArticleProceedings Paper
ISBN Number0022-3093
Accession NumberISI:000250235200064
Keywordscoefficients, dynamics, liquid alloys and liquid metals, LIQUID ALUMINUM, metals, neutron diffraction/scattering, self-diffusion, TRANSPORT, transport properties-liquids
Abstract

Quasielastic cold neutron scattering experiments on molten Al1-xCux alloys (x = 0.10, 0.17 and 0.25) have been performed at three different temperatures on the FOCUS time-of-flight spectrometer at the Swiss neutron spallation source SINQ. As the main part of the scattering at small Q is incoherent and originating from Cu, self-diffusion coefficients D for the Cu ions could be determined from the widths of quasielastic peaks. The derived values are considerably larger than those found in capillary tube measurements. Even if the accuracy in the determination of D is better than about 4% it could not be concluded whether the temperature variation of D follows an Arrhenius law or a power law. (c) 2007 Elsevier B.V. All rights reserved.

DOI10.1016/j.jnoncrysol.2007.05.074
Alternate JournalJ. Non-Cryst. Solids