A METHOD FOR RAPID CHEMICAL VAPOR INFILTRATION OF CERAMIC COMPOSITES

Publisher Website
Google Scholar
Abstract
Processes for the preparation of composite bodies using chemical vapor deposition have been developed at Oak Ridge National Laboratory (ORNL). Composites are prepared by infiltrating ceramic fiber preforms, held at elevated temperatures, with reactant gases that decompose to deposit ceramic matrix material between and around the fibers. The ORNL process is a marked improvement over those commonly in use ; preforms that previously required weeks to densify now require ~24 h. Specimens with densities up to 90 % of theoretical and strengths in the range of 400 to 450 MPa have been produced. Most importantly, the materials fail noncatastrophically, exhibiting typical composite behavior

This publication has 0 references indexed in Scilit: