Interfaces in alumina-SiC whisker composites

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5337107

Tiegs, T N; Becher, P F; Harris, L A

The fracture toughness of alumina-SiC whisker composites is dependent on crack behavior at the whisker-matrix interface. With SiC whiskers having low surface oxygen contents, bonding at the whisker-matrix interface is minimized, considerable crack-whisker interaction is observed on the fracture surfaces, and composites with high fracture toughness are obtained. When composites are fabricated with SiC whiskers having high surface SiO/sub 2/ contents, increased bonding at the whicker-matrix interface appears to occur, crack growth is relatively uninhibited by the whiskers, and decreased fracture toughness is observed.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5337107
• Report Number(s): CONF-860714-3; ON: DE86015650
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360303* -- Composite Materials-- Mechanical Properties-- (-1987)
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
COMPOSITE MATERIALS
CRACKS
CRYSTALS
ELECTRON SPECTROSCOPY
FRACTURE PROPERTIES
INTERFACES
MATERIALS
MECHANICAL PROPERTIES
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
SILICON CARBIDES
SILICON COMPOUNDS
SPECTROSCOPY
WHISKERS