Abstract
Abstract Stereolithography (SLA) is a commonly used ceramic 3D printing technology which is capable of accurate and industrial production. Based on this technology, ZrO2 ceramics were prepared using different laser power in the presented work. The forming capability of laser on the printed sample at three-dimensional directions was investigated by combining the Gauss beam and Beer-Lambert model. Besides, the dimension variety and shrinkage after printing, debinding, and sintering were studied, and the scaling factors were further determined. The dimension shrinkage of the stratified surface outnumbers that of the laser scanned surface. Therefore, the printing direction has a significant influence on the dimensional accuracy. The weight, density, and porosity of the designed ceramics using different laser power were analyzed as well. It was found that the weight of parts after the debinding process can be reduced by 97.6% of the total deduction of the weight, while the density of parts in sintering process was increased by 86.9% of the total increase of the density. It should be highlighted that the ZrO2 ceramic gears and integrated bearing with the relative density of 97%, hardness of 13.1 GPa, fracture toughness of 5.62 MPa·m1/2, and flexural strength of 1044 MPa, were obtained using the optimum laser power of 360 mW.
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