Coupling of in-situ X-ray Microtomography Observations with Discrete Element Simulations-Application to Powder Sintering
- Laboratoire SIMAP, Grenoble INP/CNRS/UJF, BP 46, 38402 Saint Martin d'Heres Cedex (France)
- Laboratoire LMGP, Grenoble INP/CNRS, BP 257, 38013 Grenoble Cedex 01 (France)
- ESRF, BP 220, 38043 Grenoble Cedex (France)
The sintering of both a powder with a wide particle size distribution (0-63 {mu}m) and of a powder with artificially created pores is investigated by coupling in situ X-ray microtomography observations with Discrete Element simulations. The micro structure evolution of the copper particles is observed by microtomography all along a typical sintering cycle at 1050 deg. C at the European Synchrotron Research Facilities (ESRF, Grenoble, France). A quantitative analysis of the 3D images provides original data on interparticle indentation, coordination and particle displacements throughout sintering. In parallel, the sintering of similar powder systems has been simulated with a discrete element code which incorporates appropriate sintering contact laws from the literature. The initial numerical packing is generated directly from the 3D microtomography images or alternatively from a random set of particles with the same size distribution. The comparison between the information drawn from the simulations and the one obtained by tomography leads to the conclusion that the first method is not satisfactory because real particles are not perfectly spherical as the numerical ones. On the opposite the packings built with the second method show sintering behaviors close to the behaviors of real materials, although particle rearrangement is underestimated by DEM simulations.
- OSTI ID:
- 21316821
- Journal Information:
- AIP Conference Proceedings, Vol. 1145, Issue 1; Conference: 6. International conference on micromechanics of granular media, Golden, CO (United States), 13-17 Jul 2009; Other Information: DOI: 10.1063/1.3180085; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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