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Modelling of the influence of dihedral angle, volume fractions, particle size and coordination on the driving forces for sintering of dual phase systems

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Delannay, Francis [UCL]

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.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2005
Language Anglais
Journal information "Philosophical Magazine (London, 2003)" - Vol. 85, no. 31, p. 3719-3733 (2005)
Peer reviewed yes
Publisher Taylor & Francis Ltd (Abingdon)
issn 1478-6435
e-issn 1478-6443
Publication status Publié
Affiliation UCL - FSA/MAPR - Département des sciences des matériaux et des procédés
Links
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Bibliographic reference Delannay, Francis. Modelling of the influence of dihedral angle, volume fractions, particle size and coordination on the driving forces for sintering of dual phase systems. In: Philosophical Magazine (London, 2003), Vol. 85, no. 31, p. 3719-3733 (2005)
Permanent URL http://hdl.handle.net/2078.1/38970