Mechanical property characterization of fiber-reinforced SiC matrix composites
Mechanical properties of Nicalon-fiber-reinforced silicon carbide (SiC) matrix composites fabricated by a forced chemical vapor infiltration (CVI) process have been measured and compared with properties of composites fabricated by a conventional isothermal process. Flexure strengths, tensile strengths, and fracture toughnesses measured at room temperature and flexure strengths measured at high temperatures are nearly identical for composites fabricated by the two processes provided that hot-face temperatures <1200{degree}C are used for the forced CVI process. Reduced strengths are observed for composites fabricated by forced CVI at temperatures >1200{degree}C because of the degradation in strength of Nicalon fibers. Composites reinforced with more stable Tyranno fibers were fabricated by forced CVI and exhibited mechanical properties similar to those of Nicalon-reinforced composites. Composites reinforced with Tyranno fibers also exhibited improved high-temperature strengths. 33 refs., 7 figs., 6 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6937422
- Report Number(s):
- ORNL/TM-11524; ON: DE90010257
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chemical vapor infiltration of fiber-reinforced SiC matrix composites
Mechanical and thermal properties of SiC-SiC composites made with CVR SiC fibers
Related Subjects
010400* -- Coal
Lignite
& Peat-- Processing
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
CARBIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
COAL
COMBUSTORS
COMPOSITE MATERIALS
CORRELATIONS
ENERGY SOURCES
FABRICATION
FLEXURAL STRENGTH
FOSSIL FUELS
FRACTURE PROPERTIES
FUELS
MATERIALS
MECHANICAL PROPERTIES
PROCESSING
REINFORCED MATERIALS
SILICON CARBIDES
SILICON COMPOUNDS
TEMPERATURE EFFECTS