[sup 7]Be tracer diffusion in a deeply supercooled Zr[sub 46.7]Ti[sub 8.3]Cu[sub 7.5]Ni[sub 10]Be[sub 27.5] melt

Rehmet, A.; Ra¨tzke, K.; Faupel, F.; Eversheim, P. D.; Freitag, K.; Geyer, U.; Schneider, S.
October 2001
Applied Physics Letters;10/29/2001, Vol. 79 Issue 18, p2892
Academic Journal
Beryllium self-diffusion in the deeply supercooled state of a Zr[sub 46.7]Ti[sub 8.3]Cu[sub 7.5]Ni[sub 10]Be[sub 27.5] alloy has been studied by a radiotracer technique by employing the isotope [sup 7]Be in combination with ion-beam sectioning. The temperature dependence of the diffusivity D is Arrhenius like with D(T)=10[sup 2.6] m[sup 2] s[sup -1] exp(-2.6 eV/k[sub B]T). The tracer diffusivities consistently extend the size dependence of the diffusion observed in the supercooled liquid state of this alloy to the smallest constituent, but are at variance with previously published results of chemical Be diffusion. © 2001 American Institute of Physics.


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