Chapter 30. Effects of Air Leaks on the Phase Content, Microstructure, and Interfacial Behavior of CVD Zirconia on SiC Fiber
- Hua-Tay Lin,
- Mrityunjay Singh
Published Online: 26 MAR 2008
DOI: 10.1002/9780470294741.ch30
Copyright © 2002 The American Ceramic Society
Book Title
26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3
Additional Information
How to Cite
Li, H., Lee, J. and Lee, W. Y. (2008) Effects of Air Leaks on the Phase Content, Microstructure, and Interfacial Behavior of CVD Zirconia on SiC Fiber, in 26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3 (eds H.-T. Lin and M. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294741.ch30
Publication History
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 2002
Book Series:
ISBN Information
Print ISBN: 9780470375785
Online ISBN: 9780470294741
- Summary
- Chapter
- References
Keywords:
- nucleation;
- chemical vapor deposition(CVD);
- mechanism;
- scanning electron microscope (SEM);
- delamination
Summary
A slight increase in the rate of air leaks into the CVD-ZrO2 process appeared to mitigate the nucleation of tetragonal ZrOz phase. Without the nucleation of the tetragonal phase, the ZrO2 layer was well bonded to the Sic fiber surface and exhibitedno delamination at the fibedcoating interface region. This strong bonding at the fiberhating interface could significantly decrease, depending on the ZrO2 coating thickness, the tensile failure load of the coated Sic fiber tows. In contrast, ZrO2 coating specimens, produced at the lower air leak rates, contained the tetragonal ZrO2 phase. For these specimens, delamination occurred within the ZrO2 coating, and the coating did not decrease the fiber tow failure load. These results suggest that such a small change in the air leak rate could significantly change the nucleation behvior of ZrO2 and consequently its interfacial properties as a fiber coating for SiC/SiC composites.