New Aspects of Gas-Induced Swelling in Helium-Implanted Nickel during Annealing

  • V. N. Chernikov
  • P. R. Kazansky
  • H. Trinkaus
  • P. Jung
  • H. Ullmaier
Part of the NATO ASI Series book series (NSSB, volume 279)

Abstract

We review results of an extensive study on bubble coarsening in nickel and provide some useful additional data which round off our picture deduced from the combined experimental evidence and from theoretical considerations: During annealing the bubble structure near the surface and near grain boundaries coarsens faster than in the bulk, leading to separated populations of large and small bubbles, respectively. The coarsening mechanism of the large bubbles near boundaries is identified as Ostwald ripening, whereas in the bulk coarsening proceeds by slow migration and coalescence, i.e. the bulk bubbles remain small and keep their overpressure.

Keywords

Porosity Nickel Migration Recombination Helium 

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Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • V. N. Chernikov
    • 1
  • P. R. Kazansky
    • 1
  • H. Trinkaus
    • 2
    • 3
  • P. Jung
    • 2
    • 3
  • H. Ullmaier
    • 2
    • 3
  1. 1.Institute of Physical ChemistryThe Academy of Sciences of the USSRMoscowUSSR
  2. 2.Institut für Festkörperforschung des Forschungszentrums JülichJülichDeutschland
  3. 3.BRD and Association KFA-EURATOMGermany

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