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Shape accommodation during grain growth in the presence of a liquid phase

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Abstract

The shape change of large tungsten spheres in a matrix of small tungsten particles and nickel-rich melt was studied. The formation of polyhedral particle shapes, which require less interspace to be filled with melt or pores may be caused by shape accommodation or contact flattening. Calculations support that shape accommodation during Ostwald ripening occurs, due to the small cross sections for diffusion in the melt of the neck areas of the large growing particles. It was shown that shape changes caused by shape accommodation may occur even at low stresses in flat neck areas in contrast to the contact flattening mechanism which require high stresses in these regions.

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Authors and Affiliations

  1. Max-Planck-Institut für Metallforschung Institut für Werkstoffwissenschaften Pulvermetallurgisches Laboratorium, Heisenbergstr. 5, 7000, Stuttgart 80, West Germany

    W. A. Kaysser, M. Žvkovič & G. Petzow

Authors
  1. W. A. Kaysser
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  2. M. Žvkovič
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  3. G. Petzow
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Additional information

On leave from Računski Centre, Institute Boris Kidrič, Vinča, Beograd, Yugoslavia.

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Kaysser, W.A., Žvkovič, M. & Petzow, G. Shape accommodation during grain growth in the presence of a liquid phase. J Mater Sci 20, 578–584 (1985). https://doi.org/10.1007/BF01026528

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  • DOI: https://doi.org/10.1007/BF01026528

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