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Polymer-derived silicon nitride ceramics by digital light processing based additive manufacturing |
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| Authors: | Min Wang Chen Xie Rujie He Guojiao Ding Keqiang Zhang Gang Wang Daining Fang |
| Affiliation: | 1. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, P. R. China
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, P. R. China;2. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, P. R. China;3. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, P. R. China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing, P. R. China;4. School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu, P. R. China |
| Abstract: | In this work, silicon nitride ceramic components with simple cuboid and complex honeycomb and lattice structures from preceramic polymers were fabricated by using digital light processing (DLP) based additive manufacturing and pyrolysis. The photosensitive precursor for DLP based additive manufacturing was prepared by mixing high ceramic yield polysilazane with commercial acrylic resin and photoinitiator. The material formulation and the structure of the green body were characterized by using FTIR. Si3N4 ceramic cuboid, 2D-structured Si3N4 ceramic honeycomb, and 2D-structured Si3N4 ceramic lattice with high precision were fabricated. The DLP-prepared specimens were pyrolyzed at different temperatures, and the crystalline phases after pyrolysis were analyzed by using XRD. The optimal pyrolysis temperature was found to be 1400°C.microstructures were characterized by using SEM. The compressive behavior of the complex-shaped Si3N4 ceramic structures was measured and discussed in detail. |
| Keywords: | additive manufacturing digital light processing polymer derived ceramics Si3N4 |