Title
Aluminum Impurity Diffusion in Magnesium
Abbreviated Journal Title
J. Phase Equilib. Diffus.
Keywords
aluminum; impurity diffusivity; magnesium; secondary ion mass; spectroscopy; ALLOYS; Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &; Metallurgical Engineering
Abstract
The diffusion of Al in polycrystalline Mg (99.9%) was studied via depth profiling with secondary ion mass spectrometry in the temperature range of 573-673 K, utilizing the thin film method and thin film solution to the diffusion equation. Multiple samples with multiple depth profiles on each sample were obtained to determine statistically confident coefficients with a maximum standard deviation between measurements of 16%. The activation energy and pre-exponential factor of Al impurity diffusion in Mg were determined as 155 kJ/mole and 3.9 x 10(-3) m(2)/s, respectively. The Mg substrates have a small grain size (similar to 10 mu m) and therefore some contributions from grain boundary diffusion are expected in the measurements. Sputter roughening during depth profiling, which is inherent to the SIMS process, also contributes to the measured diffusion coefficient, especially in samples with smaller grain sizes.
Journal Title
Journal of Phase Equilibria and Diffusion
Volume
33
Issue/Number
2
Publication Date
1-1-2012
Document Type
Article
Language
English
First Page
121
Last Page
125
WOS Identifier
ISSN
1547-7037
Recommended Citation
"Aluminum Impurity Diffusion in Magnesium" (2012). Faculty Bibliography 2010s. 2331.
https://stars.library.ucf.edu/facultybib2010/2331
Comments
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