Wear of an alumina-silicon carbide whisker composite

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6882951

Yust, C S; Leitnaker, J M; DeVore, C E

Room temperature unlubricated sliding wear in a pin-on-disc apparatus causes mild wear in alumina-silicon carbide whisker composites at loads as great as 8.9 N and for test durations up to 4 h. The wear for these conditions is in the range of 10/sup -8/ to 10/sup -9/ mm/sup 3//N-m, and is four orders of magnitude lower than for commercial alumina. The result of unlubricated sliding at 425/sup 0/C is severe wear for the range of conditions studied, and the corresponding wear coefficient is 10/sup -4/ to 10/sup -5/ mm/sup 3//N-m, almost two orders of magnitude lower than for commercial alumina. The transition from mild to severe wear begins with the formation of surface cracks which intersect whiskers. Friction coefficient values for room-temperature, mild wear behavior are lower than those associated with high-temperature severe wear.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6882951
• Report Number(s): CONF-870476-1; ON: DE87004283
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
COMPOSITE MATERIALS
CRACKS
CRYSTALS
ELECTRON MICROSCOPY
FRICTION
INTERFACES
MATERIALS
MICROSCOPY
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
SCANNING ELECTRON MICROSCOPY
SILICON CARBIDES
SILICON COMPOUNDS
SLIDING FRICTION
SURFACES
WEAR
WHISKERS