Shrinkage Compensation and Effect of Building Orientation on Mechanical Properties of Ceramic Stereolithography Parts
Arora P. Mostafa K.G. Russell E. Dehgahi S. Butt S.U. Talamona D. Qureshi A.J.
October 2023Multidisciplinary Digital Publishing Institute (MDPI)
Polymers
2023#15Issue 19
Stereolithography additive manufacturing (SLA-AM) can be used to produce ceramic structures by selectively curing a photosensitive resin that has ceramic powder in it. The photosensitive resin acts as a ceramic powder binder, which is burned, and the remaining ceramic part is sintered during post-processing using a temperature–time-controlled furnace. Due to this process, the ceramic part shrinks and becomes porous. Moreover, additive manufacturing leads to the orthotropic behavior of the manufactured parts. This article studies the effect of the manufacturing orientation of ceramic parts produced via SLA-AM on dimensional accuracy. Scaled CAD models were created by including the calculated shrinkage factor. The dimensions of the final sintered specimens were very close to the desired dimensions. As sintering induces porosity and reduces the mechanical strength, in this study, the effect of orientation on strength was investigated, and it was concluded that the on-edge specimen possessed by far the highest strength in terms of both compression and tension.
additive manufacturing , ceramic stereolithography , ceramics , mechanical properties , porosity , shrinkage , vat polymerization
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Additive Design and Manufacturing Systems Laboratory, Department of Mechanical Engineering, University of Alberta, Edmonton, T6G 2R3, AB, Canada
Fraunhofer Institute of Production Technology IPT, RWTH Aachen, Aachen, 52062, Germany
Department of Mechanical Engineering (CEME), National University of Sciences and Technology (NUST), Islamabad, 46000, Pakistan
School of Engineering and Digital Sciences, Nazarbayev University, Astana, 010000, Kazakhstan
Additive Design and Manufacturing Systems Laboratory
Fraunhofer Institute of Production Technology IPT
Department of Mechanical Engineering (CEME)
School of Engineering and Digital Sciences
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