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Preparation of carbon fiber reinforced composite by impregnation with perhydropolysilazane followed by pressureless firing

Conference · · Ceramic Engineering and Science Proceedings; (United States)
OSTI ID:7292787
Filament wound carbon fiber/Si-N and carbon fiber/SiC whisker/Si-N composites with a density close to the theoretical limit (90-96 percent) were produced by using low-viscosity polysilazane with high ceramic yields as a matrix precursor. The composites showed good flexural strength at high temperatures. The use of dispersed SiC whiskers produced a flexural strength of 695 MPa. The fabrication method described here does not require high pressure in firing and has potential for a near-net-shape process. 8 refs.
OSTI ID:
7292787
Report Number(s):
CONF-920144--
Conference Information:
Journal Name: Ceramic Engineering and Science Proceedings; (United States) Journal Volume: 13:9-10
Country of Publication:
United States
Language:
English