Mader Markus, Hambitzer Leonhard, Schlautmann Phillip, Jenne Sophie, Greiner Christian, Hirth Florian, Helmer Dorothea, Kotz-Helmer Frederik, Rapp Bastian E
Laboratory of Process Engineering, NeptunLab, Department of Microsystems Engineering (IMTEK), Albert Ludwig University of Freiburg, Freiburg, 79110, Germany.
Freiburg Materials Research Center (FMF), Albert Ludwig University of Freiburg, Freiburg, 79104, Germany.
Adv Sci (Weinh). 2021 Dec;8(23):e2103180. doi: 10.1002/advs.202103180. Epub 2021 Oct 20.
In recent years, additive manufacturing (AM) of glass has attracted great interest in academia and industry, yet it is still mostly limited to liquid nanocomposite-based approaches for stereolithography, two-photon polymerization, or direct ink writing. Melt-extrusion-based processes, such as fused deposition modeling (FDM), which will allow facile manufacturing of large thin-walled components or simple multimaterial printing processes, are so far inaccessible for AM of transparent fused silica glass. Here, melt-extrusion-based AM of transparent fused silica is introduced by FDM and fused feedstock deposition (FFD) using thermoplastic silica nanocomposites that are converted to transparent glass using debinding and sintering. This will enable printing of previously inaccessible glass structures like high-aspect-ratio (>480) vessels with wall thicknesses down to 250 µm, delicate parts including overhanging features using polymer support structures, as well as dual extrusion for multicolored glasses.
近年来，玻璃的增材制造（AM）在学术界和工业界引起了极大的兴趣，但它仍然主要局限于基于液体纳米复合材料的立体光刻、双光子聚合或直接墨水书写方法。基于熔融挤出的工艺，如熔融沉积建模（FDM），可实现大型薄壁部件的便捷制造或简单的多材料打印工艺，但迄今为止，透明熔融石英玻璃的增材制造无法采用这种方法。在此，通过FDM和使用热塑性二氧化硅纳米复合材料的熔融原料沉积（FFD）引入了基于熔融挤出的透明熔融石英增材制造方法，该纳米复合材料通过脱脂和烧结转化为透明玻璃。这将能够打印出以前无法实现的玻璃结构，如高纵横比（>480）、壁厚低至250 µm的容器、使用聚合物支撑结构的包括悬垂特征的精细部件，以及用于多色玻璃的双挤出。
