On enhancing the manufacturability and conversion of additively manufactured polymer-derived ceramics
3D printed polymer-derived ceramics are an emerging technology designed to overcome challenges associated with ceramic fabrication. However, 3D printing polymer-derived ceramics remains difficult because of challenges encountered during the pyrolysis process, including fracture, warping, and low cer...
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Published in | Journal of the European Ceramic Society Vol. 44; no. 14; p. 116691 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.11.2024
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Subjects | |
Online Access | Get full text |
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Summary: | 3D printed polymer-derived ceramics are an emerging technology designed to overcome challenges associated with ceramic fabrication. However, 3D printing polymer-derived ceramics remains difficult because of challenges encountered during the pyrolysis process, including fracture, warping, and low ceramic yield. Here, a methodology to evaluate post-processing of as-printed vat photopolymerized polymer-derived ceramics, where four different post-processing approaches are examined to potentially improve pyrolysis outcomes is described; as-printed, UV surface flood cure, UV cure followed by a solvent soak to remove unreacted material, and a UV cure followed by intermediate heating to diffuse out unreacted material. Post-processing is introduced to increase cross-linking and eliminate partially reacted oligomers from green bodies to reduce warping and fracture during pyrolysis. After post processing, final ceramic parts showed improved pyrolysis survival and ceramic yield - 97 % and 53 %, respectively. It was demonstrated that utilization of these post-processing methods allowed larger, complex monolithic turbine vanes to be produced. |
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ISSN: | 0955-2219 1873-619X |
DOI: | 10.1016/j.jeurceramsoc.2024.116691 |