| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Preceramic Nanomaterials from Ionically Complexed Polymers and Particles |
| Author(s) |
Nicholas D. Posey, Jared H Delcamp, Matthew B Dickerson |
| On-Site Speaker (Planned) |
Nicholas D. Posey |
| Abstract Scope |
High temperature ceramics are critical for advancing aerospace capabilities for defense. Boasting toughness and thermal resistance, ceramic matrix composites, made from preceramic polymer (PCP) infiltration and pyrolysis of preforms, are desired for applications in thermal protection systems and propulsion. PCPs have several advantages, but they could be improved by reducing their shrinkage during ceramic conversion. Our team has recently reported covalent grafting of PCPs from inorganic nanoparticles as a means of incorporating a dense nanofiller in the ceramic matrix to increase mass yield and potentially aid in reducing shrinkage. Herein, we report the development of a new system where charged PCPs were non-covalently complexed with oppositely charged nanoparticles. This ionic grafting concept was also applied to a modified commercial preceramic polymer and resulted in the formation of nanocrystalline silicon carbide upon curing and pyrolysis. Ongoing work includes continued modification of grafted nanoparticles for making small-scale composites and evaluating nanoparticle infiltration. |