Fibrous monolithic ceramics: 2. Flexural strength and fracture behavior of the silicon carbide/graphite system
- Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering
The fibrous monolith microstructure consists of high aspect ratio polycrystalline cells of SiC separated by thin cell boundaries containing graphite. The SiC/100% graphite fibrous monolith has noncatastrophic fracture behavior, is damage tolerant, and is notch insensitive. The failure process is characterized by fracture along weak graphite cell boundaries. The room-temperature flexural strength is 300-350 MPa. The estimated shear strength along the graphite cell boundaries is [approximately]15 MPa. Increasing the strength of the cell boundary by additions of SiC (40-60 vol%) results in a monolithic SiC material showing brittle fracture behavior but retaining damage tolerance. Strength and fracture behavior are also influenced by cell texture and orientation.
- OSTI ID:
- 6078161
- Journal Information:
- Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 76:9; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CARBIDES
CARBON
CARBON COMPOUNDS
CERAMICS
ELEMENTAL MINERALS
ELEMENTS
FIBERS
FRACTURE PROPERTIES
GRAPHITE
MECHANICAL PROPERTIES
MICROSTRUCTURE
MINERALS
NONMETALS
SILICON CARBIDES
SILICON COMPOUNDS
TENSILE PROPERTIES