A preceramic polymer route to molded SiC ceramic parts

Conference · Tue Oct 01 00:00:00 EDT 1991 · Ceramic Engineering and Science Proceedings; (United States)

OSTI ID:5949919

Semen, J; Loop, J G

A polysilazane preceramic polymer, which yields amorphous Si-N-C ceramic material when pyrolyzed, was investigated as a binder for SiC powder in dry pressing formulations. For formulations containing 15-30 wt pct polysilazane binder, the nonoxidative thermal crosslinking/pyrolysis of the molded parts at up to 1300 C produced an SiC-particulate composite material in which the dominant microstructural feature was a high level of nanoporosity in the Si-N-C matrix phase. Ongoing efforts to characterize the mechanical, physical, and microstructural properties of these ceramic materials are discussed. Preliminary work on the fabrication of several structural ceramic parts is also presented to illustrate the unique processing characteristics of these materials. 5 refs.

• OSTI ID: 5949919
• Report Number(s): CONF-910162-; CODEN: CESPD
• Journal Information: Ceramic Engineering and Science Proceedings; (United States), Vol. 12; Conference: 15. annual conference on composites and advanced ceramics, Cocoa Beach, FL (United States), 13-16 Jan 1991; ISSN 0196-6219
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
FABRICATION
SILICON CARBIDES
BINDERS
COMPOSITE MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MOLDING
ORGANOMETALLIC COMPOUNDS
PHYSICAL PROPERTIES
POLYMERS
POWDERS
PYROLYSIS
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DECOMPOSITION
MATERIALS
ORGANIC COMPOUNDS
SILICON COMPOUNDS
THERMOCHEMICAL PROCESSES
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication