4.8 Article

Diffusion in Al-Cu Melts Studied by Time-Resolved X-Ray Radiography

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PHYSICAL REVIEW LETTERS
卷 104, 期 3, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.035902

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  1. Alexander von Humboldt foundation

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We use time-resolved x-ray radiography in order to monitor interdiffusion processes in situ in liquid alloys. We measure temperature and composition dependent interdiffusion coefficients (D-AlCu) in Al-rich Al-Cu melts. At constant temperature, D-AlCu only exhibits a weak dependence of the alloy composition. As compared to self-diffusion, interdiffusion is enhanced by a factor of about 3. Our results demonstrate that it is not possible to express interdiffusion in terms of self-diffusion and thermodynamic driving forces.

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