Diffusion of bismuth and gold in nanocrystalline copper

H. J. Höfler, R. S. Averback, H. Hahn, H. Gleiter

Research output: Contribution to journalArticlepeer-review


Measurements of Bi and Au diffusion in nanocrystalline (n-) Cu and of Bi in copper thin films have been performed. The results show that (a) the diffusivity in n-Cu can be enhanced by more than ten orders of magnitude with respect to that in single-crystalline Cu. (b) Grain boundaries in n-Cu have a higher free energy and volume than conventional grain boundaries. (c) Relaxation can take place in n-Cu. (d) Diffusion measurements in n-materials represent a convenient means to determine thermodynamic properties such as grain boundary energies, solubilities, heats of segregation, and solution.

Original languageEnglish (US)
Pages (from-to)3832-3839
Number of pages8
JournalJournal of Applied Physics
Issue number6
StatePublished - 1993

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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