Powder bed fusion of polyamide powders combined with different preceramic polymers infiltration and pyrolysis to produce complex-shaped ceramics |
| |
Affiliation: | 1. University of Applied Sciences (SUPSI): Mechanical Engineering and Materials Technology Institute (MEMTi), Polo Universitario Lugano, 6962 Lugano, Switzerland;2. Department of Industrial Engineering, University of Padova, 35131 Padova, Italy;3. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA |
| |
Abstract: | The fabrication of a wide range of polymer-derived ceramic parts with high geometric complexity through a novel hybrid additive manufacturing technique is presented in this article. The process that we introduced in a previous work uses the powder bed fusion technology to manufacture high porous polymeric preforms to be then converted into ceramics through preceramic polymer infiltration and pyrolysis. The cellular architectures of a rotated cube (strut-based) and a gyroid (sheet-based) with 25 mm diameter, 44 mm height and 67 % of geometric macroporosity were generated and used for the fabrication. The complex structures were 3D printed and polycarbosilane, polycarbosiloxane, polysilazane and furan liquid polymers were used to produce SiC, SiOC, SiCN and glassy carbon, respectively. Despite a linear shrinkage of about 24 %, the parts maintained their designed complex shape without deformations. The significant advantages of the proposed method are the maturity of powder bed fusion for polymers with respect to ceramic additive manufacturing techniques and the possibility to fabricate net-shape complex ceramic parts directly from preceramic precursors. |
| |
Keywords: | Powder bed fusion Infiltration Preceramic polymers TPMS Polymer derived ceramics |
本文献已被 ScienceDirect 等数据库收录! |
|