| Abstract Scope |
The development of novel materials is pivotal for advancing technologies that demand lightweight, high-strength components. This study delves into 3D-printed ceramic structures crafted from a preceramic polymer derived from siloxane resins, with a primary focus on nano-reinforced ceramic composites. Our goal is to investigate the feasibility and mechanical properties of these ceramics, analyzing how printing parameters like layer exposure duration and thickness influence their characteristics. Additionally, we assess composition, density, shrinkage behavior, and compression performance. Our study explores the fabrication feasibility, mechanical properties, and potential applications of these 3D-printed nano-reinforced ceramic composites. We establish a direct relationship between cure depth and exposure time, crucial for optimizing printing parameters. Photo-rheology tests indicate rapid resin curing, making them ideal for vat photopolymerization printing. Thermogravimetric analysis reveals significant mass loss during pyrolysis, primarily from aromatic hydrocarbons. SEM-EDX confirms the ceramics' composition as SiOC with an even distribution, where lattice design influences shrinkage and density. Micro-CT scans showcase defect-free green-stage structures, with 10% relative density retaining shape post-pyrolysis compared to 40% structures with distortions and voids. Compression tests reveal varying fracture patterns, with Schwarz G 10% showing sequential fractures and Schwarz D 10% exhibiting a complex failure sequence. Remarkably, lower relative density structures, such as Schwarz G 10%, demonstrate higher specific energy absorption (see Figure 1). In conclusion, precise control over printing parameters enables the creation of lightweight, high-strength nano-reinforced ceramic composites with tailored energy absorption. These materials show promise for flexible protections and other applications. |