粉末圧粉体の焼結における微視的収縮挙動の粒状要素法シミュレーション

概要

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A method for simulating microscopic shrinkage behavior of powder particles in sintering of a compact is proposed. In this method, the power particles are modelled as many circular elements undergoing viscoplastic deformation due to surface tension during the sintering, and the microscopic shrinkage is calculated by equilibrating forces acting on the elements. The change of the neck shapes in the boundaries between the elements due to the shrinkage is taken into consideration. Plane-strain shrinkage in sintering is calculated under regular and irregular dispositions of power particles. In the regular disposition of powers having the same diameter, the obtained shrinkage beravior is compared with the experimental one using glass rods and the calculated one by the viscoplastic finite element simulation. It is shown from the simulation of irregular disposition that the densification due to the sintering is heightened by mixing powders having different diameters.
一般社団法人日本機械学会の論文
1996-12-25