Layer by layer fabrication of zirconia by different UV light position approaching in digital light processing method
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The digital light processing (DLP) 3D printing method can be used to achieve continuous ceramic laminations during additivemanufacturing. However, it has limited applications because its green body, which is photocured by adding a resin andphotoinitiator to the ceramic powder, cracks during the debinding process. In this study, we used four types of acrylic resinswith low functional groups and mixed 82 wt% zirconia powder with the photoinitiator and dispersant to prepare a slurry. Under a certain content of photoinitiator, the photocured zirconia green body was prepared by controlling the light intensityconditions of 32 W/m2 and 38 W/m2, and the light exposure time of 3s and 7s, respectively. Furthermore, we conductedexperiments focused on the condition of photocuring green body according to the printing approach based on the UV lightposition, as well as cracking of the green body after the debinding process. The position of the UV light influenced thecontinuous lamination behavior and intervention of oxygen during photocuring, and based on these results, we investigatethe differences in the laminated layer interphase of the photocured green body and its relationship to cracking with thedebinding behavior.
Abstract
The digital light processing (DLP) 3D printing method can be used to achieve continuous ceramic laminations during additivemanufacturing. However, it has limited applications because its green body, which is photocured by adding a resin andphotoinitiator to the ceramic powder, cracks during the debinding process. In this study, we used four types of acrylic resinswith low functional groups and mixed 82 wt% zirconia powder with the photoinitiator and dispersant to prepare a slurry. Under a certain content of photoinitiator, the photocured zirconia green body was prepared by controlling the light intensityconditions of 32 W/m2 and 38 W/m2, and the light exposure time of 3s and 7s, respectively. Furthermore, we conductedexperiments focused on the condition of photocuring green body according to the printing approach based on the UV lightposition, as well as cracking of the green body after the debinding process. The position of the UV light influenced thecontinuous lamination behavior and intervention of oxygen during photocuring, and based on these results, we investigatethe differences in the laminated layer interphase of the photocured green body and its relationship to cracking with thedebinding behavior.