1. Numerical simulation of microstructural evolution during sintering at the mesoscale in a 3D powder compact
- Author
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Veena Tikare, Michael V. Braginsky, Alexander Vagnon, Didier Bouvard, Sandia National Laboratories [Albuquerque] (SNL), Sandia National Laboratories - Corporation, Universal Energy Syst. INC Dayton, Universal Energy Syst. Inc. Dayton, Science et Ingénierie des Matériaux et Procédés (SIMaP), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
MECHANISM ,Materials science ,General Computer Science ,POTTS-MODEL ,General Physics and Astronomy ,Sintering ,Numerical simulation ,02 engineering and technology ,01 natural sciences ,COMPUTER-SIMULATION ,Densification ,0103 physical sciences ,PARTICLES ,General Materials Science ,Kinetic Monte Carlo ,Diffusion (business) ,Porosity ,KINETICS ,010302 applied physics ,Microstructural evolution ,Computer simulation ,GRAIN-GROWTH ,Modeling ,[CHIM.MATE]Chemical Sciences/Material chemistry ,General Chemistry ,Mechanics ,021001 nanoscience & nanotechnology ,DIFFUSION ,Computational Mathematics ,Grain growth ,Crystallography ,BOUNDARY ,MOLECULAR-DYNAMICS ,Mechanics of Materials ,Particle ,0210 nano-technology ,FINITE-ELEMENT ,Potts model - Abstract
International audience; This paper presents a numerical model that is capable of simulating microstructural evolution during simple solid-state sintering of a complex 3D powder particle compact. This model, a Potts kinetic Monte Carlo model, is a true mesoscale model that can simulate a large number of particles while resolving microstructural features such as particles, necks, pores and more in detail. Furthermore, it is shown that this model can simulate all the stages of sintering from the initial particle contact to neck growth with open, percolating porosity to closed isolated pores seamlessly. The various kinetic processes that lead to densification and other microstructural changes are shown to be simulated correctly. The model is demonstrated by comparing the microstructural evolution resulting from simulation to experimental results, namely 3D microtomographic images obtained from synchrotron radiation of a Cu-powder compact while it was sintering. For quantitative comparison, we extrapolated a grain structure into the simple microtomographic image that consists of mass distribution only.
- Published
- 2010
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