Additive manufacturing (AM) of ceramics has significantly contributed to advancements in ceramic fabrication, solving some of the difficulties of conventional ceramic processing and providing additional possibilities for the structure and function of components. However, defects induced by the layer‐by‐layer approach on which traditional AM techniques are based still constitute a challenge to address. This study presents the volumetric AM of a SiOC ceramic from a preceramic polymer using xolography, a linear volumetric AM process that allows to avoid the staircase effect typical of other vat photopolymerization techniques. Besides optimizing the trade‐off between preceramic polymer content and transmittance, a pore generator is introduced to create transient channels for gas release before decomposition of the organic constituents and moieties, resulting in crack‐free solid ceramic structures even at low ceramic yield. Formulation optimization alleviated sinking of printed parts during printing and prevented shape distortion. Complex solid and porous ceramic structures with a smooth surface and sharp features are fabricated under the optimized parameters. This work provides a new method for the AM of ceramics at µm/mm scale with high surface quality and large geometry variety in an efficient way, opening the possibility for applications in fields such as micromechanical systems and microelectronic components.

中文翻译：

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通过 Xolography 进行 SiOC 体积增材制造


陶瓷增材制造 (AM) 极大地促进了陶瓷制造的进步，解决了传统陶瓷加工的一些困难，并为组件的结构和功能提供了更多可能性。然而，传统增材制造技术所基于的逐层方法所带来的缺陷仍然是一个需要解决的挑战。这项研究展示了使用xolography从陶瓷前体聚合物制备SiOC陶瓷的体积AM，这是一种线性体积AM工艺，可以避免其他槽光聚合技术典型的阶梯效应。除了优化陶瓷前体聚合物含量和透射率之间的权衡外，还引入了孔隙发生器，以在有机成分和部分分解之前创建气体释放的瞬时通道，即使在陶瓷产量较低的情况下也能产生无裂纹的固体陶瓷结构。配方优化减轻了打印过程中打印部件的下沉并防止形状变形。在优化的参数下制造出具有光滑表面和尖锐特征的复杂固体和多孔陶瓷结构。这项工作为微米/毫米级陶瓷的高效增材制造提供了一种新方法，该陶瓷具有高表面质量和大几何形状变化，为微机械系统和微电子元件等领域的应用开辟了可能性。