Tracer impurity diffusion in amorphous NixZr1-x alloys

H. M. Wu, R. S. Averback

Research output: Contribution to journalArticlepeer-review

Abstract

Impurity tracer diffusion coefficients for Co and Hf were measured in a series of amorphous NixZr1-x alloys at various temperatures for 0.3<x<0.7. The diffusion coefficients for Co, an impurity with small atomic radius were, depending on alloy composition and temperature, two to four orders of magnitude larger than those for Hf, an impurity with large atomic radius. Whereas the Hf tracer diffusion coefficients are independent of alloy composition, those of Co decrease strongly with increasing Ni concentration. These results suggest that the diffusion mechanisms for atoms with small or large atomic radii are different in amorphous Ni-Zr alloys.

Original languageEnglish (US)
Pages (from-to)2619-2621
Number of pages3
JournalApplied Physics Letters
Volume56
Issue number26
DOIs
StatePublished - 1990

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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