About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Molecular Approaches to Ceramics; Synthesis, Processing, Modeling, and Derived Ceramics
|
| Presentation Title |
Processing and Pyrolysis Effects in Polymer Derived Ultra-High Temperature Ceramics |
| Author(s) |
James Ponder, Abigail Advincula, Jared Delcamp, Timothy Pruyn, Matthew Dickerson |
| On-Site Speaker (Planned) |
James Ponder |
| Abstract Scope |
Materials capable of withstanding extreme conditions are becoming increasingly important for various aerospace applications. While silicon-based ceramics are a proven class of materials for harsh applications, transition metal-based ceramics are required for ultra-high temperature conditions. Preparation of ultra-high temperature ceramics (UHTCs) using traditional inorganic powder sintering methods limits the structural/compositional designs possible and is challenging for preparing composite components. Preceramic polymers (PCPs) have been used to address these challenges via the synthetic tunability and processing properties of polymers prior to pyrolysis. Following pyrolysis of the PCP, a polymer derived ceramic (PDC) is obtained. By tuning the PCP structure, curing/pyrolysis conditions, and pyrolysis atmosphere, the composition of the PDC can be manipulated for different properties. Here we demonstrate how these variables can change the composition and microstructure of polymer derived UHTC nanocomposites. |