Forced chemical vapor infiltration fabrication of SiC/SiC composites

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6713701

Stinton, D P; Lowden, R A; Besmann, T M; Starr, T L

Composites consisting of silicon carbide matrices reinforced with ceramic fibers, whiskers, or platelets have been fabricated by forced-chemical vapor infiltration (FCVI). Processing of composites reinforced with Nicalon fibers by FCVI has been optimized after many years of study. The material exhibits adequate flexure strengths and high-fracture toughness values. Models are described that have improved the understanding of the infiltration process and will be used to better control the process. Utilizing the increased understanding of the process developed through the modeling efforts, a limited number of composites were produced from alternative reinforcements. Preliminary mechanical property measurements of these materials indicated lower strengths and less fracture toughness than composites reinforced with Nicalon fibers. 21 refs., 12 figs., 4 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6713701
• Report Number(s): CONF-8806103-4; ON: DE89001694
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
360603* -- Materials-- Properties
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
CRYSTAL STRUCTURE
CRYSTALS
FLEXURAL STRENGTH
FRACTURE PROPERTIES
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MONOCRYSTALS
SILICON CARBIDES
SILICON COMPOUNDS
WHISKERS