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Simulations of the influence of rearrangement during sintering

: Henrich, B.; Wonisch, A.; Kraft, T.; Moseler, M.; Riedel, H.


Acta Materialia 55 (2007), No.2, pp.753-762
ISSN: 1359-6454
ISSN: 1873-2453
Deutsche Forschungsgemeinschaft DFG
KR 1729/5-1
Journal Article
Fraunhofer IWM ()
sintering; simulation; modeling; mesostructure; discrete element method

A three-dimensional application of the discrete element method to free, constrained and pressure-assisted solid-state sintering of powders is presented. Special emphasis is laid on the generation of realistic random initial configuration as well as on the inertia effects. With this method, internal properties such as coordination number and pair correlation function are directly accessible and compare well with theoretical predictions and experimental data. The simulation scheme also enables one to investigate how grain rearrangements on a mesoscopic scale influence macroscopic properties such as densification rate and bulk and shear viscosity. Finally, crack formation during constrained sintering of low-density films is examined.