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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