Fiber coatings for SiC-fiber-reinforced BMAS glass-ceramic composites
- Brown Univ., Providence, RI (United States). Div. of Engineering
- Univ. of Southern california, Los Angeles, CA (United States). Dept. of Materials science
- United Technologies Research Center, East Hartford, CT (United States)
Interfaces in SiC-fiber-reinforced glass-ceramic matrix composites were modified by applying different coatings to the fibers and varying the coating thickness. Coatings of SiC/BN, Si{sub 3}N{sub 4}/BN, and BN were applied to the fibers by CVD prior to composite fabrication. Interfacial microstructures were characterized using high-resolution and analytical transmission electron microscopy. Oxidation of the SiC fibers during composite fabrication was suppressed by the fiber coatings, provided that the coatings were sufficiently thick to prevent oxygen diffusion from the matrix. The SiC/BN and BN coatings were stable during high-temperature exposures, while the Si{sub 3}N{sub 4}/BN coating underwent chemical reactions.
- Sponsoring Organization:
- Department of the Air Force, Washington, DC (United States); Office of Naval Research, Washington, DC (United States)
- OSTI ID:
- 455181
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 1 Vol. 80; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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