Fiber-matrix interfacial characteristics in a fiber-reinforced ceramic matrix composite
Fiber-matrix interfacial shear stress and mechanical properties in oxide-matrix composites uniaxially reinforced with either uncoated or coated silicon carbide filaments were measured in the as-fabricated state, and following a thermal treatment at 1300 C for 100 h. All the tested composites showed higher fiber-matrix interfacial debond stress than the frictional stress, and toughened-composite behavior. Mechanical properties of composites reinforced with uncoated filaments were unaffected by an annealing treatment at 1300 C for 100 h. In contrast, an identical annealing treatment given to a composite reinforced with coated filaments led to a decrease in first matrix cracking stress and ultimate strength. These observations were related to the changes in the measured interfacial shear stress values as a result of the annealing treatment. 10 refs.
- OSTI ID:
- 7143665
- Report Number(s):
- CONF-890130--
- Journal Information:
- Ceramic Engineering and Science Proceedings; (USA), Journal Name: Ceramic Engineering and Science Proceedings; (USA) Vol. 10; ISSN 0196-6219; ISSN CESPD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CARBIDES
CARBON COMPOUNDS
CERAMICS
CHALCOGENIDES
COMPOSITE MATERIALS
ELECTRON MICROSCOPY
FIBERS
HEAT TREATMENTS
INTERFACES
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
REINFORCED MATERIALS
SHEAR PROPERTIES
SILICON CARBIDES
SILICON COMPOUNDS