(YIP) FUNCTIONAL NANOFILLERS FOR POLYMER DERIVED CERAMICS
Abstract
Breakthroughs in advanced aerospace materials capable of high-temperature operations require innovations in new silicon-based polymer-derived ceramic (PDC) nanocomposites with improved electrical properties and controlled microstructure design. The characteristics that render less expensive Si-O-C containing PDCs attractive as robust, lightweight aerospace materials. To enhance mechanical properties of PDC nanocomposites with nanofillers, we need to understand how interfacial chemistry, thermodynamics, and precursor molecular structure of PDCs as well as nanofillers evolve with temperature and affect the final nanocomposite’s microstructure. The overall aims of this project are to design interactions of nanofillers with preceramic polymer matrices and understand nanocomposite structural evolution in real time. Toward this goal, I am developing nanomaterials synthesis to generate complex coreshell heterostructures as well as nanoparticle nucleation and growth model by using state-of-the art cross-correlative characterization and modeling capabilities. The in-situ cross-correlative characterization, which for the first time incorporates both scattering and spectroscopy, will occur from crosslinking to ceramic conversion. The suite of techniques includes scattering and spectroscopy to establish fundamental structure-property relations PDCs towards predicting properties. The outcomes of this project will provide important new insights into controlling electrical conductivity of PDCs and inform the chemical design of new PDCs within this important class of aerospace materials. The foundational knowledge established in this work can be generalized to Si-C-N, Si-B-C-N and other systems, and thus inform new molecular chemistries and filler size, shape, and functionality for a wide array of applications.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2023
- Source ID
- FA95502210074
Entities
People
- Vicky Doan-Nguyen
Organizations
- Air Force Office of Scientific Research
- Ohio State University
- United States Air Force