3D-printing of polymer‐derived SiCN ceramic matrix composites by digital light processing |
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| Affiliation: | 1. Department of Mechanical Engineering, São Carlos School of Engineering, University of São Paulo, Trabalhador São-carlense, 400, São Carlos 13566-590, Brazil;2. Federal Institute of Education, Science and Technology of São Paulo - IFSP, Primeiro de Maio, 500, Itaquaquecetuba, SP, Brazil;3. Materials and Engineering Research Institute, Sheffield Hallam University, Sheffield S1 1WB, UK;1. Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, PR China;2. Beijing Engineering Research Center of 3D Printing for Digital Medical Health, Beijing, 100124, PR China;3. Key Laboratory of Trans-scale Laser Manufacturing Technology, Ministry of Education, Beijing, 100124, PR China;1. Additive Manufacturing Institute, College of Mechatronics and Control Engineering, Shenzhen University, 3688 Nanhai Ave, Shenzhen 518060, China;2. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, 3688 Nanhai Ave, Shenzhen 518060, China;3. Department of Automation, College of Mechatronics and Control Engineering, Shenzhen University, 3688 Nanhai Ave, Shenzhen 518060, China;1. School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255000, China;2. School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, China;3. Shandong Guiyuan Advanced Ceramics Co., Ltd., Zibo 255086, China;4. School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo 255000, China;5. Institute of Additive Manufacturing, Shandong University of Technology, Zibo 255000, China |
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| Abstract: | In this study, we present a DLP 3D-printing strategy for the fabrication of SiCN ceramic matrix composites (CMCs). The polysilazane-based preceramic polymer containing inert fillers was UV-cured into a green body and then converted to SiCN CMCs after pyrolysis. The introduced fillers (Si3N4 particles and Si3N4 whiskers) as reinforcements are well dispersed in the matrix, which can not only effectively reduce the linear shrinkage and weight loss, but also greatly improve the mechanical properties of the SiCN CMCs. The bending strength of the SiCN CMCs reinforced with 10 wt% Si3N4 whiskers (without surface polished) reached 180.7 ± 15.6 MPa. Furthermore, the effect of fillers content on microstructure and porosity of the SiCN CMCs are discussed, and it was found that the excessive fillers led to increased pore defects and decreased continuity of the matrix, thereby reducing the mechanical properties of the SiCN CMCs. This strategy provides a promising ceramic manufacturing technique to fabricate polymer‐derived CMCs with complex-shaped and high-performance for potential demanding applications. |
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| Keywords: | 3D-printing Ceramic matrix composites Preceramic polymer Mechanical properties |
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