Ceramic Fibers and Ceramic-Matrix Composites for Ultrahigh TemperatureApplications

摘要

The overall objective of this ASSERT project is to establish processing-microstructure-property relations for Sic fibers prepared using novel pre-ceramic polymer blends and selected processing additives. Under the ASSERT parent award, it was demonstrated that SiC fibers with improved thermomechanical stability (e.g., compared to commercial fibers such as Nicalon and Hi-Nicalon ) can be fabricated using blends of organosilicon (pre-ceramic) polymers. Such fibers are of interest for application in high temperature composite materials. In the present ASSERT project, the objective is to relate the chemical/structural characteristics of selected pre-ceramic polymer blends with the SiC fiber microstructure and mechanical properties. Another objective is to determine the