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http://dx.doi.org/10.3740/MRSK.2019.29.4.221

Dispersion Stability and Mechanical Properties of ZrO2/High-temp Composite Resins by Nano- and Micro-particle Ratio for Stereolithography 3D Printing  

Song, Se Yeon (Energy Storage Materials Division, Korea Institute of Ceramic Engineering and Technology)
Park, Min Soo (Department of Mechanical System and Design Engineering, Seoul National University of Science and Technology)
Yun, Ji Sun (Energy Storage Materials Division, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Korean Journal of Materials Research / v.29, no.4, 2019 , pp. 221-227 More about this Journal
Abstract
This study examines the role of the nano- and micro-particle ratio in dispersion stability and mechanical properties of composite resins for SLA(stereolithography) 3D printing technology. VTES(vinyltriethoxysilane)-coated $ZrO_2$ ceramic particles with different nano- and micro-particle ratios are prepared by a hydrolysis and condensation reaction and then dispersed in commercial photopolymer (High-temp) based on interpenetrating networks(IPNs). The coating characteristics of VTES-coated $ZrO_2$ particles are observed by FE-TEM and FT-IR. The rheological properties of VTES-coated $ZrO_2/High-temp$ composite solution with different particle ratios are investigated by rheometer, and the dispersion properties of the composite solution are confirmed by relaxation NMR and Turbiscan. The mechanical properties of 3D-printed objects are measured by a tensile test and nanoindenter. To investigate the aggregation and dispersion properties of VTES-coated $ZrO_2$ ceramic particles with different particle ratios, we observe the cross-sectional images of 3D printed objects using FE-SEM. The 3D printed objects of the composite solution with nano-particles of 80 % demonstrate improved mechanical characteristics.
Keywords
stereolithography; zirconia; thixotropy; silane coupling agent; dispersion stability;
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