Grain Boundaries and Surface Diffusion of Copper Investigated by AFM

  1. Prof. T. W. Clyne and
  2. F. Simancik
  1. Thorsten Weber,
  2. Michael Marx,
  3. Mathias Göken and
  4. Horst Vehoff

Published Online: 21 DEC 2005

DOI: 10.1002/3527606203.ch37

Metal Matrix Composites and Metallic Foams, Volume 5

Metal Matrix Composites and Metallic Foams, Volume 5

How to Cite

Weber, T., Marx, M., Göken, M. and Vehoff, H. (2000) Grain Boundaries and Surface Diffusion of Copper Investigated by AFM, in Metal Matrix Composites and Metallic Foams, Volume 5 (eds T. W. Clyne and F. Simancik), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606203.ch37

Editor Information

  1. Department of Materials Science and Metallurgy, Cambridge University, Pembroke Street, Cambridge CB2 3QZ, U.K.

Author Information

  1. Werkstoffwissenschaften / Methodik, Universität des Saarlandes, Saarbrücken, Germany

Publication History

  1. Published Online: 21 DEC 2005
  2. Published Print: 20 APR 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301263

Online ISBN: 9783527606207

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Keywords:

  • copper;
  • surface diffusion;
  • grain boundaries;
  • atomic force microscope (AFM)

Summary

The properties of grain boundaries and interfaces have a strong influence on the mechanical properties of materials. With thermal grooving experiments the energy of grain boundaries relative to the surface energy can be determined. With an Atomic Force Microscope (AFM) the investigation of very small boundary grooves is possible because this method has a much higher resolution than optical microscopes and allows the analysis of low energy boundaries like twin boundaries. In addition, surface diffusion coefficients can be determined at lower temperatures, where only small grooves develop. In this work polycrystalline copper and nickel samples were investigated. Polished samples were annealed at different temperatures around 1023 K. The Electron Back Scattered diffraction Pattern (EBSP)-method was used to determine the orientation of neighboring crystallites at the boundary. Grain boundary grooves were investigated with an AFM. The measured profiles of the grooves are in accordance with the theory developed by Mullins. On curved boundaries, a dependence of the energy from the orientation of the grain boundary plane was observed. Different types of grain boundaries (small-angle boundaries, twin boundaries, large-angle boundaries) were analyzed.