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Lichtner, Aaron
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Publications (6/6 displayed)
- 2018Anisotropic sintering behavior of freeze-cast ceramics by optical dilatometry and discrete-element simulationscitations
- 2018Anisotropic sintering behavior of freeze-cast ceramics by optical dilatometry and discrete-element simulationscitations
- 2016Strength of hierarchically porous ceramics: Discrete simulations on X-ray nanotomography imagescitations
- 2016Effect of Macropore Anisotropy on the Mechanical Response of Hierarchically Porous Ceramicscitations
- 2012Simulation of the toughness of partially sintered ceramics with realistic microstructurescitations
- 2012Simulation of the elastic properties of porous ceramics with realistic microstructurecitations
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article
Anisotropic sintering behavior of freeze-cast ceramics by optical dilatometry and discrete-element simulations
Abstract
Directional freeze-casting of ceramic slurries followed by freeze drying and partial sintering results in materials with highly anisotropic properties parallel and transverse to the freezing direction. Physical measurements and optical dilatometry confirm that, during sintering, freeze-cast structures experience more strain along their freezing direction than transverse to it. Discrete Element (DEM) simulations of equivalent freeze-cast structures confirm this behavior. These simulations indicate that not only is sintering anisotropic on the macroscopic scale but within the walls and macropores themselves. It was determined that the anisotropic particle contact network that resulted from the aligned macropores led to anisotropic shrinkage during sintering.