Silicon carbide/silica molecular composites
Conference
·
· Ceram. Eng. Sci. Proc.; (United States)
OSTI ID:6963130
Ultrafine silicon carbide (SiC) is molecularly dispersed in a silica glass matrix to produce a SiC/SiO/sub 2/ composite. This was done by mixing a polysilane (SiC precursor) with a silica sol derived from tetramethoxysilane followed by cogellation and in-situ crosslinking of polysilane and by pyrolysis in an inert atmosphere. Despite a sluggish densification rate, as conpared with the blank SiO/sub 2/ matrix, a 3 x increase in hardness and about 2 x fracture toughness after pyrolysis at 800 C is shown. 9 references.
- OSTI ID:
- 6963130
- Report Number(s):
- CONF-860152-
- Conference Information:
- Journal Name: Ceram. Eng. Sci. Proc.; (United States) Journal Volume: 7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
BRITTLENESS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPOSITE MATERIALS
DECOMPOSITION
FABRICATION
FRACTURE PROPERTIES
HARDNESS
HYDRIDES
HYDROGEN COMPOUNDS
MATERIALS
MECHANICAL PROPERTIES
MICROHARDNESS
MINERALS
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
SILANES
SILICA
SILICON CARBIDES
SILICON COMPOUNDS
SILICON OXIDES
THERMOCHEMICAL PROCESSES
360601* -- Other Materials-- Preparation & Manufacture
BRITTLENESS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPOSITE MATERIALS
DECOMPOSITION
FABRICATION
FRACTURE PROPERTIES
HARDNESS
HYDRIDES
HYDROGEN COMPOUNDS
MATERIALS
MECHANICAL PROPERTIES
MICROHARDNESS
MINERALS
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
SILANES
SILICA
SILICON CARBIDES
SILICON COMPOUNDS
SILICON OXIDES
THERMOCHEMICAL PROCESSES