Abstract
Diffusion coefficients of lithium in magnesium were measured for the first time using liquid-solid diffusion couples and a forward-simulation analysis. Since lithium is too light to be reliably measured using electron probe microanalysis (EPMA), the diffusion profiles of lithium were determined by the difference between 100 percent and the Mg composition measured using EPMA. Those profiles were then proportionally adjusted to match the solubility values evaluated from reliable Mg-Li phase diagram data. Such a combined method of lithium composition by difference and proportionating to match solubility data can substantially facilitate future measurements of lithium diffusion coefficients in other lithium-containing systems.
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