Abstract
Rubidium stabilized α-alumina was selected as a potential interface coating material for high temperature ceramic matrix composites. The coatings were developed by MOCVD on sapphire monofilaments which were then hot pressed in an alumina matrix for testing of coating's thermal, chemical, and morphological stability and interfacial properties. While earlier studies have shown Rb β-alumina to be stable up to 1600 °C, this study showed loss of rubidia from surface of bulk specimens above 1200 °C. The coating appears to be chemically stable and compatible with alumina in the hot pressed specimen. Indentation tests performed on the hot pressed specimens show crack deflection at the fiber-matrix interface whereas push out tests showed no debonding of the fiber from the matrix.
Original language | English (US) |
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Title of host publication | Ceramic Engineering and Science Proceedings |
Editors | V. Greenhut |
Publisher | American Ceramic Soc |
Pages | 250-257 |
Number of pages | 8 |
Volume | 17 |
Edition | 4 |
State | Published - 1996 |
Externally published | Yes |
Event | Proceedings of the 1996 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B - Cocoa Beach, FL, USA Duration: Jan 7 1996 → Jan 11 1996 |
Other
Other | Proceedings of the 1996 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B |
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City | Cocoa Beach, FL, USA |
Period | 1/7/96 → 1/11/96 |
ASJC Scopus subject areas
- Ceramics and Composites