| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Ceramic-based Materials: Process Development, Materials, Process Optimization and Applications
|
| Presentation Title |
Fused Filament Fabrication of Ceramic Matrix Composite Preforms Via Thermo-Oxidative Stabilization of Polyetheretherketone |
| Author(s) |
Dustin Gilmer, Samuel Pankratz, Corson Cramer, James Klett, Greg Larsen, Uday Vaidya |
| On-Site Speaker (Planned) |
Dustin Gilmer |
| Abstract Scope |
Carbon-fiber-reinforced ceramic matrix composites (CMCs) are frequently used in applications where high thermo-mechanical loads are induced along with weight limitations. Recent work has demonstrated a new method to produce discontinuous fiber preforms through various forms of additive manufacturing, including fused filament fabrication (FFF). This work uses polyetheretherketone with discontinuous carbon fibers (CF PEEK) to additively manufacture the carbon-rich polymer precursor, which can be subsequently processed for higher densification. Critically, thermoplastic precursor materials suffer severe instability during pyrolysis as they move from melt to degradation. This work evaluates oxidative stabilization of the additively manufactured preform to preserve form at the macrostructural and microstructural scales. The chemical process undergone pre-pyrolysis and its dependence on oxygen is evaluated in depth. By developing an understanding of the conversion process, it is possible to form stable additively manufactured preforms for further processing steps and opens new avenues for manufacturing of high-temperature CMCs. |