About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Ceramic Materials and Processing
|
| Presentation Title |
Modeling Densification of Woven Preforms through Forced Flow Chemical Vapor Infiltration |
| Author(s) |
Vimal Ramanuj, Ramanan Sankaran, Daniel Fleming, Ben Lamm, Corson Cramer, Beth Armstrong |
| On-Site Speaker (Planned) |
Vimal Ramanuj |
| Abstract Scope |
Chemical vapor infiltration (CVI) is a technology to manufacture high temperature ceramic composites. While CVI has the potential to achieve nearly fully dense parts, it can be long and expensive. Existing theoretical and modeling approaches are insufficient for predictive analyses of densification especially in highly anisotropic preforms such as woven fibers. We present a pore-resolved direct numerical simulations approach to capture the transport and chemical kinetics features that govern the CVI densification. We focus on forced flow thermal gradient CVI of ceramic composites where directional densification has the potential to achieve the high quality composites while keeping the processing times low. Key processing characteristics namely, the transport and kinetics rates, thermal gradient and preform structural features are resolved in our model with emphasis on the evolution of densification states. Directional densification, a key behavior hypothesized to lower the residual voids, depends on the competing effects of these quantities. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Ceramics, Modeling and Simulation |