Fracture resistance of a TiB/sub 2/ particle/SiC matrix composite at elevated temperature

Technical Report · Wed Jun 01 00:00:00 EDT 1988

OSTI ID:6749080

Jenkins, M G; Salem, J A; Seshadri, S G

The fracture resistance of a comercial TiB/sub 2/ particle/SiC matrix composite was evaluated at temperatures ranging from 20 to 1400 C. A laser interferometric strain gauge (LISG) was used to continuously monitor the crack mouth opening displacement (CMOD) of the chevron-notched and straight-notched, three-point bend specimens used. Crack growth resistance curves (R-curves) were determined from the load versus displacement curves and displacement calibrations. Fracture toughness, work-of-fracture, and R-curve levels were found to decrease with increasing temperature. Microstructure, fracture surface, and oxidation coat were examined to explain the fracture behavior.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• OSTI ID: 6749080
• Report Number(s): N-88-26482; NASA-TM-100967; E-3842-1; NAS-1.15:100967
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
COATINGS
COMPOSITE MATERIALS
CRACK PROPAGATION
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
FRACTURE PROPERTIES
HIGH TEMPERATURE
INFORMATION
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NUMERICAL DATA
SILICON CARBIDES
SILICON COMPOUNDS
TITANIUM BORIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS