Accession Number : ADA316511

Title :   Ceramic Fibers and Ceramic-Matrix Composites for Ultrahigh Temperature Applications.

Descriptive Note : Rept. for 1 Oct 95-30 Sep 96,

Corporate Author : FLORIDA UNIV GAINESVILLE

Personal Author(s) : Sacks, M. D.

PDF Url : ADA316511

Report Date : SEP 1996

Pagination or Media Count : 8

Abstract : 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 effect of selected processing additives (i.e., boron- and aluminum-containing sintering aids and polysilazane fiber processing aids) on microstructure and mechanical properties.

Descriptors :   *CERAMIC MATRIX COMPOSITES, *CERAMIC FIBERS, *SILICON CARBIDES, TENSILE STRENGTH, MICROSTRUCTURE, SOLUTIONS(MIXTURES), STRUCTURAL PROPERTIES, HIGH TEMPERATURE, SYNTHESIS(CHEMISTRY), THERMAL STABILITY, ALUMINUM, POLYSILANES, BORON, POLYSILICONS, SINTERING.

Subject Categories : Refractory Fibers
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE