Impurity diffusion coefficients of Al and Zn in Mg determined from solid-to-solid diffusion couples
- Kammerer, Catherine
- Kulkarni, Nagraj
- Warmack, Robert
- Perry, Kelly
- Belova, Irina
- Murch, Graeme
- Sohn, Yongho
DOIAbstract
Increasing use and development of lightweight Mg-alloys have led to the desire for more fundamental research in and understanding of Mg-based systems. As property enhancing components, Al and Zn are two of the most important and common alloying elements for Mg-alloys. We have investigated the concentration dependent interdiffusion of Al and Zn in Mg using diffusion couples of pure polycrystalline Mg mated to Mg solid solutions containing either <9 at.% Al or <3 at.% Zn. Concentration profiles were determined by electron micro-probe microanalysis of the diffusion zone. The interdiffusion coefficients were determined by the classical Boltzmann-Matano method within the Mg solid solution. As the concentration of Al or Zn approaches the dilute e...
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