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Mechanismus difúze 88Y ve slitině QE22
 Čermák, Jiří ; Stloukal, Ivo
Diffusion of radioisotope 88Y was studied in magnesium-based alloy QE22 (nominal composition: Mg – 2 RE – 2.5 Ag – 0.6 Zr in wt. %, RE – rare earth metal) in temperature interval ranging from 648 K to 728 K. Diffusion behavior of the chosen tracer, which is suitable for diffusion measurements, simulates the typical migration characteristics of mischmetal components in general. Mixture of RE’s used for alloying contains Ce and Nd as principal elements and it is added in QE22 to promote the creep resistance. It was found that yttrium diffuses along dislocations that act as paths of rapid diffusion. Diffusivity of 88Y along dislocations, a2sDd, was estimated.
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