3-DIMENSIONAL STRUCTURE-IMITATION MODEL OF EVOLUTION OF MICROSTRUCTURE OF POWDER BODY DURING SINTERING
1999
This paper describes a 3D structure-imitation computer model of evolution of the powder
compact during sinteringand recrystallization without nucleation. At the initial stages of the
evolution processes (sintering until a mosaic structure of boundaries is formed) the model
particles are spheres, and two-particle interaction laws control their evolution. During
sintering the degree of mutual penetration of the particles increases, regions where spherical
particles are wholly facetted by contacts with neighboring particles are formed and grow.
These particles are described using the formalism of Voronoi radical polyhedra, and grain
growth laws govern their evolution. The model predicts the time dependencies of the
following structure parameters of the polyhedra: average polyhedron size and dispersion, total surface of the facets of the polyhedra and total lenght of the edges of the polyhedra.
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