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Note

These are slides for a talk that I gave at Materials Science and Technology 2018 conference in Columbus on 15th of October 2018. The symposium was Additive Manufacturing: Modeling and Simulation of AM Materials, Processes, and Mechanics.

Brief ABSTRACT

Multiple experiments were conducted to investigate the propagation of furfuryl alcohol resin in silica sand covered with catalyst. As a result, models for final bound sand sample and such propagation were obtained. Studied samples were created by placing 10-4000μl droplets of resin into 400μm round grain sand with 0.7%wt. p-Totuenesulfonic acid. Bound sample cross-sections have been studied and gave approximations about final sample volume, shape, morphology and mechanical properties. Using this data, a simple model for predicting an approximate result of resin propagation was obtained. To determine the intermediate shape of samples, time-lap optical micrographs of back-lighted sand after the resin droplet implantation were used. Next, 50μm accuracy 3D scans of bound sample were performed to obtain accurate STL models. Based on those experiments and well-known physical phenomena, a model of resin propagation was obtained and should generalize for any propagation in porous catalyzing medium.