Mechanical behavior of alumina reinforced with carbon-coated silicon carbide whiskers

Journal Article · Sun Oct 01 00:00:00 EDT 1995 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1995.tb08039.x· OSTI ID:131533

Steyer, T E; Faber, K T ^[1]

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1. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering

SiC whiskers with 0, 20, and 50 {angstrom} carbon coatings were incorporated into an alumina matrix to modify residual thermal stress and interfacial bonding. Composites were characterized using triaxial X-ray diffraction for residual stress determination and electron microscopy to explore interfacial chemistry. Fracture toughness and R-curve behavior were examined for short and long crack lengths. Uncoated SiC whiskers optimized strength, fracture toughness, and R-curve behavior of these composites. A graphite interphase at the whisker/matrix interface decreased contributions to crack bridging without promoting additional toughening by whisker pullout.

• Sponsoring Organization: USDOE
• OSTI ID: 131533
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 10 Vol. 78; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CARBON
COMPOSITE MATERIALS
ELECTRON MICROSCOPY
FRACTURE MECHANICS
FRACTURE PROPERTIES
INTERFACES
MICROSTRUCTURE
RESIDUAL STRESSES
SAMPLE PREPARATION
SILICON CARBIDES
SURFACE COATING
X-RAY DIFFRACTION