| 초록 |
This study is to optimize the sintering properties of 3YSZ (3 mol% yttria stabilized zirconia) ceramic 3D-printed green body with 50 vol% of ceramic contents manufactured by supportless stereolithography (SLA) 3D printing technology. The 3YSZ ceramic nanocomposite resins with vinyltriethoxysilane (VTES) coated 3YSZ ceramics for the improved dispersion stability was manufactured based on 1,6-hexanediol diacrylate (HDDA) monomer, and the viscosity and flowability of the nanocomposite resins were optimized by control of the non-reactive diluent content to suit for suppotless SLA 3D printing process. The drying and debinding processes of 3YSZ 3D-printed objects were optimized to inhibit the formation of the defects based on TG-DTA results, and the sintering temperature and sintering time have been controlled to have high density and high strength based on XRD, SEM and flexural strength analysis. As a result, the 3YSZ 3D-printed sintered body sintered at optimized conditions had the relative density of 99.95% and flexural strength of 1008.5 MPa. |
