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Vzájemná difúze v systému Mg/Mg17Al12
Rothová, Věra ; Čermák, Jiří
Light Mg-based alloys are perspective materials for automotive industry. The presence of the brittle phase Mg17Al12 in the structure of the materials causes, however, certain problems in their production and during the application. It is known that desirable mechanic parameters can be easily achieved by a special annealing which leads to a less-harmful morphology of Mg17Al12 phase. The physical background of the process consists in the diffusion-controlled redistribution of components in the alloy. In the present work, the interdiffusion coefficients were measured in diffusion couples made of Mg and Mg17Al12. The results may contribute to an optimization of production process.
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Difúze 71Ge a 68Ge v Mg a ve slitině Mg-2Al
Čermák, Jiří ; Eversheim, D. ; Rothová, Věra ; Stloukal, Ivo
Measurement of Ge diffusion coefficients in Mg and in Mg-1.8 wt.% Al alloy is presented in this work. Two techniques of Ge deposition and two annealing atmospheres (Ar and Ar + Cl2) were tested which might reveal possible influence of hold-up effect at the free surface on the diffusion behavior. The present results are compared with the literature data for volume diffusion of other impurities in Mg.
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