About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPU-47: PyC Interphase Fabrication in CMCs Using Hot-Wall CVD |
| Author(s) |
Hossein Libre, Jeremy Watts, David Lipke, Jason Lonergan, Gregory E. Hilmas |
| On-Site Speaker (Planned) |
Hossein Libre |
| Abstract Scope |
Advanced aerospace systems require materials for sustained operation under extreme thermal, mechanical, and environmental loads beyond conventional superalloys. Ceramic matrix composites (CMCs) offer a compelling solution, yet adoption is limited by processing time, cost, and uniformity. The fiber interface coating is a key driver of both manufacturability and performance as the interphase governs load transfer, crack deflection, and damage tolerance. Pyrolytic carbon (PyC) interphases offer potential for defect-free, uniform coatings with controllable thickness, enabling tailored interfacial behavior in CMCs.
In this study, PyC was deposited using hot-wall chemical vapor deposition (CVD) with a methane/argon precursor to quantify the effects of deposition temperature and time. Depositions were preformed over 800-1100°C for 1-4h to establish a process-structure matrix. Coating thickness, uniformity, and microstructure were characterized by SEM and Raman spectroscopy. These results provide a foundational framework for tailoring PyC deposition and resulting properties to improve reliability and damage tolerance in advanced CMCs. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Ceramics, Surface Modification and Coatings, Composites |