Abstract
A model is formulated to account for structural and collective reorganization effects in a random packing of spherical particles which, during sintering, is undergoing global densification as a consequence of reduction of the total free surface energy. This model is found to describe, both qualitatively and quantitatively, the rearrangement of the stacking in such a way that areas with high local coordination tend to contract at a relatively high rate and zones with low coordination densify at a reduced rate or even decrease their density. Statistical effects arising from peculiarities in the particle packing can also be analysed with the help of the mathematical description given. It is found that the rearrangement may also give rise to structural defects and ultimately lead to poor mechanical properties.
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Veringa, H.J. Statistical treatment of the sintering defect model and ceramic morphology development. JOURNAL OF MATERIALS SCIENCE 28, 2757–2762 (1993). https://doi.org/10.1007/BF00356214
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DOI: https://doi.org/10.1007/BF00356214