R-curve behavior in a silicon carbide whisker/alumina matrix composite

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb05267.x· OSTI ID:6021612

Homeny, J; Vaughn, W L ^[1]

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1. Illinois Univ., Urbana, IL (USA). Dept. of Materials Science and Engineering

R-curve measurements were performed on a SiC whisker/al{sub 2}O{sub 3} matrix composite. A controlled flaw/strength technique was utilized to determine fracture resistance as a function of crack extension. Rising R-curve behavior with increasing crack extension was observed, confirming the operation of wake toughening effects on the crack growth resistance. Observations of crack/microstructure interactions reveal that bridging by intact whiskers in the crack wake was the mechanism responsible for the rising R-curve behavior.

• OSTI ID: 6021612
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 73:7; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360603 -- Materials-- Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
COMPOSITE MATERIALS
CRACK PROPAGATION
CRYSTAL STRUCTURE
CRYSTALS
FRACTURE PROPERTIES
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
SILICON CARBIDES
SILICON COMPOUNDS
WHISKERS