The Diffusion Coefficient of Scandium in Dilute Aluminum-Scandium Alloys

The diffusion coefficient of Sc in dilute Al-Sc alloys has been determined at 748 K, 823 K, and 898 K (475 °C, 550 °C, and 625 °C, respectively) using semi-infinite diffusion couples. Good agreement was found between the results of the present study and both the higher temperature, direct measuremen...

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Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2014-08, Vol.45 (9), p.3800-3805
Main Authors: Kerkove, Marcel A., Wood, Thomas D., Sanders, Paul G., Kampe, Stephen L., Swenson, Douglas
Format: Article
Language:English
Subjects:
Alloys
Aluminum base alloys
Applied sciences
Characterization and Evaluation of Materials
Chemistry and Materials Science
Diffusion
Diffusion coefficient
Dilution
Exact sciences and technology
Materials Science
Mathematical analysis
Metallic Materials
Metallurgy
Metals. Metallurgy
Nanotechnology
Scandium
Standard error
Structural Materials
Surfaces and Interfaces
Thin Films
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cited_by cdi_FETCH-LOGICAL-c449t-3da99246b120258fc36e6ce47e135acdd1aa52105b61f84a153199dad81ee4e93
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container_issue 9
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container_title Metallurgical and materials transactions. A, Physical metallurgy and materials science
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creator Kerkove, Marcel A.
Wood, Thomas D.
Sanders, Paul G.
Kampe, Stephen L.
Swenson, Douglas
description The diffusion coefficient of Sc in dilute Al-Sc alloys has been determined at 748 K, 823 K, and 898 K (475 °C, 550 °C, and 625 °C, respectively) using semi-infinite diffusion couples. Good agreement was found between the results of the present study and both the higher temperature, direct measurements and lower temperature, indirect measurements of these coefficients reported previously in the literature. The temperature-dependent diffusion coefficient equation derived from the data obtained in the present investigation was found to be D m 2 / s = 2.34 ± 2.16 × 10 - 4 m 2 / s exp - 167 ± 6 kJ / mol R T . Combining these results with data from the literature and fitting all data simultaneously to an Arrhenius relationship yielded the expression D m 2 / s = 2.65 ± 0.84 × 10 - 4 m 2 / s exp - 168 ± 2 kJ / mol R T . In each equation given above, R is 0.0083144 kJ/mol K, T is in Kelvin, and the uncertainties are ±1 standard error.
doi_str_mv 10.1007/s11661-014-2275-4
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source Springer Nature
subjects Alloys
Aluminum base alloys
Applied sciences
Characterization and Evaluation of Materials
Chemistry and Materials Science
Diffusion
Diffusion coefficient
Dilution
Exact sciences and technology
Materials Science
Mathematical analysis
Metallic Materials
Metallurgy
Metals. Metallurgy
Nanotechnology
Scandium
Standard error
Structural Materials
Surfaces and Interfaces
Thin Films
title The Diffusion Coefficient of Scandium in Dilute Aluminum-Scandium Alloys
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