Material Transport Rate and Stress Distribution During Grain Boundary Diffusion Driven by Surface Tension

  • H.E Exner
  • P. Bross

Abstract

During sintering of irregular particles or irregular arrangements of spherical particles asymmetric necks may form. The problem of stress distribution and grain boundary diffusion is solved analytically for symmetric and asymmetric necks. The stress distribution, the atomic flux and the rate of material removal or material deposition in the grain boundary are shown graphically for various ratios of curvatures at the left and the right hand side of the neck and for a constant curvature ratio for varying grain boundary length. Some conclusions are drawn for material transport and angle change between the particles during sintering.

Keywords

Stress Distribution Material Removal Material Removal Rate Surface Curvature Boundary Diffusion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    G. Petzow and H. E. Exner, Z. Metallk. 67, 611 (1976).Google Scholar
  2. 2.
    H. E. Exner, G. Petzow and P. Wellner, Sintering and Related Phenomena (edited by G.C. Kuczynski), p. 351. Plenum Press. New York (1973).Google Scholar
  3. 3.
    H. E. Exner, G. Petzow, H. Kummer, P. Wellner and H. L. Lukas, 4th Int. Powder Met. Conference in the CSSR, Part 3, p. 47. Dom Techniky SVTS, Zilina (1974).Google Scholar
  4. 4.
    H. E. Exner, Grundlagen von Sintervorgangen, Materialkdl Stuttgart-Techn. Reihe, (edited by G. Petzow) Vol. 4 Gebr. Borntraeger Berlin, (1978).Google Scholar
  5. 5.
    D. L. Johnson, Physics of Sintering (B), 1 (1969).Google Scholar
  6. 6.
    H. Udin, A. Shaler and J. Wulff, Metall. Trans. 185, 186 (1949).Google Scholar
  7. 7.
    P. Bross, Ph.D. thesis. University of Stuttgart (1976).Google Scholar
  8. 8.
    P. Bross and H. E. Exner, Acta Metall. 27, 1013 (1979), also published in this book, pp. 185-99.CrossRefGoogle Scholar

Copyright information

© Elsevier Science Publishers Ltd 1990

Authors and Affiliations

  • H.E Exner
    • 1
  • P. Bross
    • 1
  1. 1.Max-Planck-Institut für MetallforschungInstitut für WerkstoffwissenschaftenStuttgartGermany

Personalised recommendations