Abstract
The kinetics and grain growth mechanism in ion beam mixing have been investigated for the AI-Mn system. First, we determined the temperature dependence of mixing rate using Rutherford backscattering and then the phases formed by ion beam mixing were characterized by x-ray and electron diffraction analyses. The present experiments demonstrate that the residual diffusive motion is the decisive factor for direct formation of the various phases of intermetallic AI-Mn alloys. The residual diffusivity depends strongly on the mixing temperature and its relaxation time ranges from 10-12 up to l0-6 sec or longer. Finally, a model describing the ion beam mixing effect is proposed.
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