A New Approach for Sintering Simulation of Irregularly Shaped Powder Particles-Part II: Statistical Powder Modeling

被引:3
作者
Weiner, Max [1 ]
Zienert, Tilo [2 ]
Schmidtchen, Matthias [1 ]
Hubalkova, Jana [2 ]
Aneziris, Christos G. [2 ]
Prahl, Ulrich [1 ]
机构
[1] TU Bergakad Freiberg, Inst Met Forming, Bernhard von Cotta Str 4, D-09599 Freiberg, Germany
[2] TU Bergakad Freiberg, Inst Ceram Refractories & Composite Mat, Agricolastr 17, D-09599 Freiberg, Germany
关键词
laser scanning microscopy; Monte Carlo method; morphology; powder; sintering simulation; statistics; PHASE-FIELD MODEL; EQUILIBRIUM PORE SURFACES; GRAIN-GROWTH; NUMERICAL-SIMULATION; CONSTITUTIVE-EQUATIONS; INTERPARTICLE NECKS; COMPUTER-SIMULATION; CRYSTALLINE SOLIDS; EVOLUTION; DENSIFICATION;
D O I
10.1002/adem.202200443
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Current simulations of sintering processes work often with heavily idealized powder geometries. As sintering is mainly driven by gradients of chemical potential due to surface curvatures, a realistic description of the particle geometry is essential for achieving precise simulation results. In previous work, a model able to simulate sintering behavior of irregularly shaped particles was shown. Herein, a statistical approach for description of particles' morphology in a powder mixture is developed by fitting a simplified particle shape model on image data. The obtained data are analyzed and conditioned for input into sintering simulation. Instead of building an equivalent volume cell of particles, as common, a Monte Carlo approach is applied to describe the sintering behavior of the powder. The resulting distributions of sintering time curves are analyzed regarding the influence of the morphology description in comparison to circular particles. Using thumb rules of Cohen's effect size, a small effect on shrinkage and a medium effect on neck radii is observed.
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页数:10
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