| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Preceramic Polymers; Synthesis, Processing, Modeling, and Derived Ceramics
|
| Presentation Title |
X-ray Computed Tomography Investigation of CMC Densification via Polymer Infiltration and Pyrolysis |
| Author(s) |
Derek S. King, Thomas Key, Connor Wycoff, Craig Przybyla, Michael Cinibulk |
| On-Site Speaker (Planned) |
Derek S. King |
| Abstract Scope |
X-ray computed tomography (XCT) was utilized to analyze a plain weave, carbon fiber, ceramic matrix composite (CMC) and assess its densification via the polymer infiltration and pyrolysis (PIP) process. The relative nesting and stacking of tows in the X and Y directions, for adjacent plies, produced three ply relationships, defined as Type I, Type II, and Type III. These ply relationships were correlated to the formation of large void spaces within the composite. Such void spaces have been previously observed to remain, even after PIP densification. XCT analysis after each PIP cycle revealed that fine void features, such as cracks or delaminations, were filled and began to densify from the first PIP cycle; however, the large void structure remained unfilled. In this talk, the formation of the large void structure will be discussed and the possible mechanisms that prohibit or facilitate CMC densification, via PIP processing, will be introduced. |