Journal
PHILOSOPHICAL MAGAZINE
Volume 85, Issue 31, Pages 3719-3733Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786430500318860
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The equilibrium shape of solid particles in an aggregate immersed in a liquid or in a gas results from the minimization of interface energy. A model is developed for expressing the dependence of the solid-solid and solid-second phase interface areas on the system parameters: phase Volume fractions, dihedral angle, particle size and coordination. The model aims at allowing quantitative assessment of the role of these parameters on the driving force for sintering. The representative Volume element is a cone of which the apex angle accounts for the average particle coordination. In order to comply with the uniformity of interface curvature, the solid-second phase interfaces are described using the mathematics of the Delaunay surfaces. The results are compared with the Solutions obtained by approximating the interface shape by the revolution of an arc of circle around the cone axis. This approximation does not involve a significant loss of precision.
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