Local Structural and Tracer Diffusion Mechanism in Amorphous Fe-based Alloys
Current Journal of Applied Science and Technology · pp. 789–798 · Published 10 May 2013
10.9734/BJAST/2013/3788Abstract
Local structure and tracer diffusion mechanism in amorphous Fe and Fe80B20 solids is studied using the statistic relaxation (SR) model containing 2×105 atoms. It was found a large number of bubbles which could break-up and leads to diffusion. A bubble diffusion mechanism is proposed and the diffusion coefficient determined in term of this mechanism is in reasonable agreement with experimental data. The decrease in diffusion coefficient upon thermal annealing observed experimentally for most amorphous Fe-based alloys is interpreted as a result of reduced number of bubbles in system.
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