Hot ceramic lithography of silica-based ceramic cores: The effect of process temperature on vat-photopolymierisation

An enhanced-temperature vat photo-polymerisation of ceramic-loaded mixtures, or so called hot ceramic lithography, has been presented in this paper, for 3D printing silica-based cores used the investment casting section parts aero and industrial turbines. The pre post-sintering properties printed highly depend on polymerisation degree base resin binders rheological behaviour slurry, lithography can play a significant role both. First, paper aimed to better understand how different temperatures (25,35,45 55 °C) would affect binder mixtures before loading particles, by conducting tensile, DMA FTIR analysis binder-only prints. impact elevated temperature mechanical loaded was further investigated. highest were achieved when process set closer mixtures' initial glass transition (when is cured at room-temperature). This yet lower than level causing heat-induced cross-linking high enhance mobility monomers active species, compared with conventional room-temperature photopolymerisation printing. results indicate that temperature, if as described, significantly property conversion rate successful print process. second part study investigates peeling forces (61.2 vol% SiO2-ZrSiO4). suspension showed shear thickening 25 °C, hindering replenishment slurry during printing, while from shear-thickening shear-thinning behaviour, ideal flawless observed an optimum 35 °C. When increases 45 °C then viscosity mixture very low material static printing) increases, hence affecting forces. Comparing force measurements higher density, reactivity binder, leads stronger adhesion between layers printer's transparent film, separation/peeling To sum up, right resolve many post issues, such deformation cracking, leading more dimensionally-accurate components.