Thermal Stereolithography of SiC-Loaded Acrylate Resins with Polymer-Derived Ceramic Infiltration

作者：Evelyn Wang, Shruti Gupta, Joseph Fortenbaugh, Caillin J. Ryan, Christopher M. DeSalle, Jeffrey R. Shallenberger, Douglas E. Wolfe, Benjamin J. Lear, Michael A. Hickner · 发表于：ACS Applied Engineering Materials · 年份：2025 · DOI：10.1021/acsaenm.5c00054 · 被引用次数：6 · 研究领域：Additive Manufacturing and 3D Printing Technologies、Dental materials and restorations、Photopolymerization techniques and applications

High Resolution Image Download MS PowerPoint Slide The implementation of stereolithography (SLA) for fabricating 3D-structured polymer-derived ceramics (PDCs) has greatly improved the resolution, manufacturing potential, and widespread capability to produce complicated component geometries in ceramic materials. However, different material systems impose challenges to the traditional UV SLA photo-cross-linking process due to a narrow window of material selection requirements─UV transparency, UV degradation resistance, the ability to support the photoinduced radical curing mechanism, and ambient shelf life stability. Herein, a near-infrared (NIR) thermal SLA printing technology is demonstrated on a composite thermally curable acrylate-based highly loaded resin to overcome current issues with UV light-driven SLA additive manufacturing of preceramic polymers (PCP). For this thermal SLA cross-linking method, a high-intensity NIR laser (λ = 808 nm) was used to generate localized thermal heating at the resin pool interface, which led to rapid, targeted thermal free-radical polymerization and solidification of the SiC particle-laden acrylate-based resin during laser scanning. Thermally cured printed parts were demonstrated using a gantry-based movement platform and a resin pool in a top-down laser scanning configuration. After printing, the green bodies were debinded, followed by polymer infiltration and pyrolysis (PIP) during postprocessing, which enhanced the mechanical strength of...