Improvements in the fabrication of ceramic-fiber-ceramic-matrix composites by chemical vapor infiltration

Technical Report · Sat Jun 01 00:00:00 EDT 1985

DOI:https://doi.org/10.2172/5425226· OSTI ID:5425226

Caputo, A. J.; Lowden, R. A.; Stinton, D. P.

Development of a new, faster process for the fabrication of ceramic-fiber-reinforced-ceramic-matrix composites by chemical vapor infiltration has continued. Composites of SiC fibers infiltrated with a matrix of either SiC or Si/sub 3/N/sub 4/ have been produced. Process and equipment improvements led to the fabrication of preforms with a higher fiber content, and infiltration improvements reduced infiltration times and increased infiltrated densities. These improvements have produced composites with higher flexural strengths (up to 475 MPa) and high strain values (up to 1%). The high strength and high strain values along with the gradual loss of strength (in contrast to the sudden loss typical of ceramics) were major goals of this work.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5425226
• Report Number(s): ORNL/TM-9651; ON: DE85015971
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
FLEXURAL STRENGTH
PRODUCTION
REINFORCED MATERIALS
SILICON CARBIDES
SILICON NITRIDES
CHEMICAL VAPOR DEPOSITION
FIBERS
CARBIDES
CARBON COMPOUNDS
CHEMICAL COATING
DEPOSITION
MATERIALS
MECHANICAL PROPERTIES
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
SILICON COMPOUNDS
SURFACE COATING
360301* - Composite Materials- Preparation & Fabrication- (-1987)