Interfacial roughness in ceramic matrix composites

Conference · Sat Aug 01 00:00:00 EDT 1992 · Ceramic Engineering and Science Proceedings; (United States)

OSTI ID:7039434

Jero, P D; Parthasarathy, T A; Kerans, R J

Recent work using push-out and push-back tests has shown that interfacial roughness contributes substantially to the sliding friction in at least some ceramic matrix composites (CMC's). Other work examining frictional heating of CMC's during cyclic fatigue has shown the important role that interfacial friction plays, and further that the interface is degraded upon extended cycling. From this it is apparent that interfacial roughness may play a key role in determining composite behavior. Although the observation of a seating drop during fiber push-back gives some information about the amplitude and spatial extent of the interfacial roughness, actual measurement of the roughness has proven difficult due to its extremely fine scale. In the present work, a laser interferometer has been used to examine the roughness of composite interfaces (both fiber and matrix) as well as virgin fibers. In addition, long range (mm scale) push-out tests have been followed by interferometric characterization to examine the severity and rate of interfacial degradation associated with fiber sliding. 4 refs.

• OSTI ID: 7039434
• Report Number(s): CONF-920144-; CODEN: CESPD
• Journal Information: Ceramic Engineering and Science Proceedings; (United States), Vol. 13:7-8; Conference: 16. annual conference on composites, materials, and structures, Cocoa Beach, FL (United States), 13-16 Jan 1992; ISSN 0196-6219
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BOROSILICATE GLASS
ROUGHNESS
COMPOSITE MATERIALS
SILICON CARBIDES
DEFORMATION
FATIGUE
FIBERS
INTERFACES
INTERFEROMETRY
LASERS
MATRIX MATERIALS
MECHANICAL TESTS
SLIDING FRICTION
THERMAL CYCLING
CARBIDES
CARBON COMPOUNDS
FRICTION
GLASS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
SILICON COMPOUNDS
SURFACE PROPERTIES
TESTING
360603* - Materials- Properties